Baking Bread with the Romans: Part II – Panis Quadratus

Friends, Romans, Baking Enthusiasts: Lend me your ears! …. Who wants to make Pompeiian Bread? If you do then you’ve come to the right place.

Carbonised Panis Quadratus Excavated at Villa Regina (Napoli, IT)

Many of us have seen the iconic images of carbonised loaves of bread that were excavated from Pompeii, Herculaneum, and other settlements in the Bay of Naples (Italy), that were destroyed during the eruption of Mount Vesuvius in 79 AD. But have you ever wondered what that bread might have tasted like? How was it made? What ingredients went into those loaves? What is that funny-looking, sectioned bread called anyways? It’s called ‘Panis Quadratus‘, my friends, and historically it is one of the most beautiful representations of food ever found in the archaeological record.

Named because of the four cuts made to the loaf, creating eight evenly distributed sections that were pre-cut into the loaf prior to baking, ‘Panis Quadratus’ was represented a great deal in the archaeological record at Pompeii both in art and in artefact.  The reconstructed recipe for Panis Quadratus below provides an opportunity to explore the history of Pompeii and Roman food culture further by using a very appropriate sensory avenue: taste. We’ll also familiarise ourselves with the baking labour process by getting our hands dirty, using some good old fashioned elbow-grease, and handling this loaf from scratch from start to finish as we add our own creative touches. If you read the first part of this two-part series on Roman bread-baking (Baking Bread with the Romans: Part I – Pliny the Elder’s Leaven) then you may have already made your own leaven (also known as bread starter, yeast, sourdough starter, pasta madre, levain) which is called for in this recipe. If you have not been able to make your own leaven yet, you can return to the first article and give it a try or you can buy your own. It’s often possible to find starter for sale at your local bakery or grocery store. But before we roll up our sleeves and tie the donkey to the quern-stone, let’s have a bit of history first, shall we?

Pompeii 

The history and destruction of the ancient city of Pompeii is a topic that has captured the hearts and minds of historians for hundreds of years. There is a tragic and romantic aspect to the manner in which the city and its population met its demise, during a catastrophic volcanic eruption in 79 AD, which creates a strong desire for many to learn more about the site and the people that inhabited it. Mount Vesuvius took thousands of lives on that fateful day in 79 AD and buried several settlements, not just Pompeii, in ash, pumice and pyroclastic flow. The result was a horrific event that essentially created an invaluable archaeological time-capsule along the eastern Bay of Naples preserving many impressions of Roman provincial life for many future generations to study. Pompeii alone hosted a population of approximately 12,000 people on a grid covering almost 66 hectares of land; it is now widely accepted to be the most important archaeological site in the world.

View of Mount Vesuvius from Pompeii (2017). Photo by Farrell Monaco

Now, if you are like me, you probably enjoy reading about Pompeii or studying the endless sources of Classical historical data that the site has to offer. If you’re just starting out on this voyage of discovery, you’re in for a beautiful ride. But if you’ve already put your toe in that water you’ll have also realised that ‘studying Pompeii’ is something that you will be doing for the remainder of your life. There is no end of research, discovery, theory and interpretation that can come from studying Pompeii, or Herculaneum, for that matter. There is also no end to the avenues of study that you can choose from once you dig a bit deeper into the material culture that the ancient ruins have to offer: architecture, art, civic infrastructure, engineering, construction, epigraphy, ceramics, metallurgy, trade, sociology, theology, politics, and foodways. Each one of these avenues of Pompeiian history tells us a great deal about daily provincial life in the Roman Republican and early Imperial periods.

The area that I enjoy researching the most at Pompeii, of course, is food. Food-related archaeological data conveys a great deal of information about people and their daily lives; it can also tell us a great deal about other objects or contexts in an archaeological setting. Food can provide insight if we use radiocarbon dating, for example, to date organic food residue, or we can use food remnants themselves as a relative dating tool to contextualise other objects found in the same environment. For example, closer examinations of food remnants related to the Vesuvian eruption recently resulted in a challenge of the eruption date of August 24, 79 AD. Some archaeologists believe that the eruption occured later than the currently accepted date. Here’s why: Preserved fruit and nuts that were examined further were known to have been ripe in the autumn and wine-making processes in ceramic dolia were found to have already been underway by the time that the eruption had occured. All of this new food-related data thus connoted a harvest, or autumnal time-frame for the eruption, over that of a late summer date. This debate is still ongoing but it is fascinating to see how food-related archaeological data from Pompeii and the surrounding areas can contribute to understanding the bigger pictures in so many ways.

Panis Quadratus as featured on a fresco at the Museo Archeologico Nazionale di Napoli. Photo by Farrell Monaco

What fascinates me the most about Pompeii and the daily lives of its residents was its love of bread. In fact, if you gave me a huge research grant and a lifetime supply of water and sun-screen, you’ll likely find me camped out, alongside Enzo the stray dog, in one of Pompeii’s thirty-five bakeries. Why? Because bread was the backbone of Pompeii’s daily diet; the bread bakers were powerful people in Roman society; and the bakeries themselves are incredibly telling and sensory environments. You see, bread was a critical commodity at Pompeii. It required massive quantities of grain, fire-wood, and slave and animal labour to produce a daily supply to feed 12,000 people. Donkeys walked in circles tirelessly, for hours on end, rotating the quern-stones (grain-mills) that ground the wheat; slaves did the same when animal-labour was not possible. The ovens were fired around the clock and enough grain had to be imported from within the region or from provincially confiscated territories to supply the Roman people with their daily bread. Bread was prepared daily, in high volume, often in the home but mostly in commercial bakeries run by a Corpus Pistorum (or Collegium Pistorum): a veritable trade-union of powerful bakers who were likely looked upon as a Roman version of the ‘Hoffa teamsters’ of the day. The men who controlled the bread and the commercial ovens often ran for office or influenced civic elections themselves. A common saying of the day was to say that a baker ‘gave good bread’, ‘bonum panem fert’, which meant that he could be a trusted community member or a potential civic official. To understand the power that bakers once held in Imperial Rome, all one has to do is stand in the shadow of the enormous tomb of master baker

Tomb of Marcus Vergilius Eurysaces the Baker

Marcus Vergilius Eurysaces that was erected outside of Porta Maggiore in Rome during the 1st century BC. Professional bakers in Rome, and in Pompeii, did not exist until the 2nd century BC and it is theorised that this advancement in specialised crafts has everything to do with the conquering of Macedonia for the Republic by Aemilius Paulus. It is also assumed that Pliny the Elder’s reference to Greek knowledge of leaven indicates that yeast likely became a component of Roman bread-making during this time as Greek bakers were employed in Roman settings: The Greeks have established a rule that for a modius of meal eight ounces of leaven is enough.” (Pliny the Elder, Historia Naturalis – Book XVIII-26(11)). This also suggests that the advent of leavened bread-making by the Romans in the 2nd century, despite the feelings of disgust or impurity that ‘putrefied and rotten dough’ invoked in many, brought bread to a whole new level of social and dietary significance.

In order to explore the loaves of bread themselves and look into the ingredients that were used in Roman breads, we can refer back to other references in the documentary record from Pliny the Elder. In the following passages he references grains that were used to make bread:

Spelt: Of all these grains barley is the lightest, its weight rarely exceeding fifteen pounds to the modius, while that of the bean is twenty-two. Spelt is much heavier than barley, and wheat heavier than spelt.” (Pliny the Elder, Historia Naturalis –Book XXVI-11); 

Carbonised Grains Excavated at Villa Regina (Napoli, IT)

Wheat and Leaven: “Of the various kinds of wheat which are imported at the present day into Rome, the lightest in weight are those which come from Gaul and Chersonnesus; for, upon weighing them, it will be found that they do not yield more than twenty pounds to the modius. The grain of Sardinia weighs half a pound more, and that of Alexandria one-third of a pound more than that of Sardinia; the Sicilian wheat is the same in weight as the Alexandrian. The Bœotian wheat, again, weighs a whole pound more than these last, and that of Africa a pound and three quarters. In Italy beyond the Padus, the spelt, to my knowledge, weighs twenty-five pounds to the modius, and, in the vicinity of Clusium, six-and-twenty. We find it a rule, universally established by Nature, that in every kind of commissariat bread that is made, the bread exceeds the weight of the grain by one-third; and in the same way it is generally considered that that is the best kind of wheat, which, in kneading, will absorb one congius of water. There are some kinds of wheat which give, when used by themselves, an additional weight equal to this; the Balearic wheat, for instance, which to a modius of grain yields thirty-five pounds weight of bread. Others, again, will only give this additional weight by being mixed with other kinds, the Cyprian wheat and the Alexandrian, for example; which, if used by themselves, will yield no more than twenty pounds to the modius. The wheat of Cyprus is swarthy, and produces a dark bread; for which reason it is generally mixed with the white wheat of Alexandria; the mixture yielding twenty-five pounds of bread to the modius of grain. The wheat of Thebais, in Egypt, æhen made into bread, yields twenty-six pounds to the modius. To knead the meal with sea-water, as is mostly done in the maritime districts, for the purpose of saving the salt, is extremely pernicious; there is nothing, in fact, that will more readily predispose the human body to disease. In Gaul and Spain, where they make a drink by steeping corn in the way that has been already described—they employ the foam6 which thickens upon the surface as a leaven: hence it is that the bread in those countries is lighter than that made else- where.” (Pliny the Elder, Historia Naturalis –Book XXVI-12);

A Day in the Life of a Roman Bread Bakery

Salt in Bread Dough: “At the present day, however, the leaven is prepared from the meal that is used for making the bread. For this purpose, some of the meal is kneaded before adding the salt, and is then boiled to the consistency of porridge, and left till it begins to turn sour. In most cases, however, they do not warm it at all, but only make use of a little of the dough that has been kept from the day before.” (Pliny the Elder, Historia Naturalis – Book XVIII-26(11)).

(From: Pliny the Elder, Natural History. Perseus at tufts.edu)

Now, if we refer to this information above and couple it with the visual information that has been gleaned from frescoes and carbonised bread that was excavated from Pompeii, and other sites that were decimated by the eruption of 79 AD, we have a fairly accurate idea of what should go into a recipe for Panis Quadratus. Of course, we’ll never be 100% sure of how this loaf was made or why it’s shaped the way that it is (what the heck made that centre groove anyways??)…but speculation, interpretation and experimentation is half of the fun and it’s also an important part of education. So with that said, let us roll up our sleeves, tie the donkey to the grain-mill and make some Panis Quadratus! Note: If you’re like me and you don’t have a donkey on hand, pre-ground flour will suffice! Here is what you’re going to need:

 

Baking Bread with the Romans: Part II – Panis Quadratus

Ingredients

  • 3.5 cups (600 gr) of Spelt Flour
  • 3.5 cups (600 gr) of Whole Wheat Flour
  • 3 cups (700 gr) tepid water
  • 1 cup (200 gr) of leaven (starter)
  • 2 tsp salt
  • Coarse ground flour or wheat bran for dusting

Implements

  • Cooking twine
  • A sharp knife or bread lame

Preparation

Leaven (or starter) after feeding.

Note: Before you start this recipe, make sure that you’ve fed your leaven (starter) 8 hours prior to mixing. You can do this by feeding the main starter or by creating a sponge (an off-shoot of the main starter) in a separate bowl. I like to feed my starter using two parts flour and one part water. It seems to result in a good stable consistency. Aim for a greek yoghurt-like consistency, not a watery consistency. You can feed the main starter 1 cup of flour and half a cup of water and leave it sit covered for 8 hours, for example. Or, to make a sponge, take 1/2 cup of starter out of the main container and add 1 cup of flour and half a cup of water. If you end up with more than a cup of starter in your sponge, put the remainder back in with your mother starter.

Step 1. Mix and autolyse: Combine the water and leaven (starter) together in a large bowl and mix it gently with a spoon or whisk. Mix the flour and salt together in a separate bowl and then combine with the liquids. Mix the wet and dry ingredients together by hand or in a mixer. Cover and let stand for an hour (autolyse).

Stretching and Folding Bread Dough

Step 2. Stretch and folds: After the 1 hour of autolysing (initial mix-and-sit phase) take the dough out and punch it down gently with your finger-tips on a clean surface. You’re going to stretch-and-fold the dough four times at 30 minute increments. This steps allows the dough to strengthen and rise as the gluten structure forms. You’ll notice that with each stretch-and-fold the dough becomes more elastic. Use a timer if you want to remind yourself of when the next stretch-and-fold step takes place. For each of the four stretch-and-folds you can treat the dough like a ‘square’. Take one side, or one corner, and pull it over towards the opposite side as in the image to the left. Do this for all 4 ‘corners’ or ‘sides’ of your dough. After each stretch-and-fold, cover the dough using a clean tea-towel or an overturned bowl and leave it sit for 30 minutes each time. Do this step four times!

Step 3. Once the four-step stretch-and-fold steps are complete, shape the dough into a ball. Try to gather the seams underneath the loaf so that the top of the loaf is smooth. Take the tray or dish that you’re going to bake the loaf in and dust the bottom of it with a coarse ground flour or whole wheat bran. Place the shaped loaf into the baking dish.

Panis Quadratus – Tying the Twine

Step 4. We’re going to follow popular theory and use baking twine to create the linear grove along the side of the loaf. It’s difficult to say why the groove is there and how it was originally made but it does not appear to have been made by the lip of a circular baking pan, as the loaves are often misshapen or bulbous below the groove as well as above it. It seems logical that something was corded or ringed around the loaf so we’ll try this method to create the groove. Take the baking twine and measure enough to encircle the exterior of entire loaf at the mid-section leaving ample length left over to tie the twine into a bow. See the image to the right for an example of what it should look like. If the twine is of the thinner variety, double it in length. Don’t tie the twine too tightly around the dough, give it a bit of room but not enough for it to fall to the base of the loaf; the dough is going to rise around the twine creating a defined lateral ‘cut’ along the side of the loaf. Once you’ve secured the twine and tied the bow, cover the loaf with a tea towel, and place it in a warm place in your kitchen to rise.

Carbonised Panis Quadratus Excavated at Villa Regina (Napoli, IT)

Step 5. Dust the top of the loaf again with the coarse flour or wheat bran that you used to line the baking dish. Get the sharpest knife in your kitchen (or a bread lame) and score the bread making four linear slashes, creating eight even sections on the loaf. We’re going to score this in the same fashion as we see the bread sectioned according to the archaeological record; see the images to the left and below as examples. Now, we can debate whether these sections were made by a knife, by a cutter, or by twine but it is difficult to determine this from the carbonised loaves that have been excavated. It is probable that bakers may have used twine to define each of the eight sections of the panis quadratus but it does seem like a fairly intricate and tricky job to complete, requiring knots or loops at eight junctions on the twine that encircles the loaf horizontally. For this recipe, we’ll use a knife. Making four slashes through the top of the loaf, cut approximately 1 cm deep into the loaf. There’s no need to go any deeper as the loaf will rise again a bit more during the initial baking process and create a nice score.

Panis Quadratus Scored and Stamped

Step 6. Now we’ll work on a final added detail that will make this loaf of Roman bread a fait accompli: we’ll give it a bread stamp. Using a cookie cutter, a pasta stamp, or any clean circular, square or rectangular cooking implement that you have, gently press a depression into one of the sections with it. I have chosen to use a few pinoli (pine nuts) to fill in the circular depression that I have made using a small cookie cutter.

Step 7. Let the dough rise now until it has risen to twice its size. The length of this part of the process is entirely dependent on the temperature of your kitchen and the humidity of the climate in which you live. It could take two hours or it could take 4 hours. Cover with a clean tea-towel or put it inside of an air-tight proofing environment. Keep an eye on the loaf and take note of once it has doubled in size and the twine becomes embedded in the side of the dough. Make sure that the dough doesn’t sit too long and expire; this is where getting to know your own starter comes in handy. The more you bake with your starter, the more you’ll know how long it will go in the rising process before it expires and the loaf deflates. For a dough with this much flour, my starter has a life of approximately 8 hours from autolysing to baking time. So I try not to let this final rise process go longer than four hours.

Step 8. Once the bread has risen fully, preheat the oven to 400 F / 200 C / Gas mark 6. Place a small pan of water in the oven as you preheat it and leave it there throughout the baking process. It will create humidity in the baking environment that will allow for a bit more oven spring as well as a durable and chewy crust.

Step 9. Bake for 30 minutes until the crust is a medium brown tone. Once the loaf is fully baked, remove it and let it stand and cool for an hour or so. Don’t cut or break the loaf until it has cooled to room temperature. The twine can easily be undone and removed by untying the bow. You can also carry the loaf around the house for a few minutes like a handbag, if you’re so inclined? Perhaps twine was used at some poin to hang or carry the loaves?…

Panis Quadratus – Tavola Mediterranea

Give yourself a pat on the back and a nice mug of mulsum! You’ve done it. You’ve baked like a Roman! Now to tasting the bread: Get in there like a legionnaire and break the loaf with your bare hands and try pairing it with some other Roman flavours. Pairing this panis quadratus with accompaniments such as honey, strong olive oils, pepper, milk and fresh cheeses will bring out the sweet and earthy flavours of the wheat and bran as well as the tangy flavour of the starter. It’ll give you an opportunity to taste what it was the Romans tasted when they ate their daily bread during cena (dinner) or at dawn during ientaculum (breakfast) as they began their days.

The end result for this recipe is a stunningly beautiful loaf of Roman bread with rich flavours and a textured crumb that is on the slightly heavier side. There is something so enjoyable about making this recipe as well: It’s a lesson in good old fashioned, honest hard work; it’s meditative; and it’s historical. Finally, the pay-off is just magnificent. This recipe for panis quadratus is something that I will be baking regularly in my home especially for special occasions. It’s steals the spotlight on the table and goes well with every meal be it breakfast, lunch or dinner. When I broke my first panis quadratus open, I swear that I could hear someone whisper ‘bonum panem fert‘ in my ear… I give good bread… But then again that might have been the mulsum talking!

Cene bene and good baking to you!

Please feel free to leave comments or suggestions about this recipe below.

 

 

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Baking Bread with the Romans: Part II – Panis Quadratus
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14 comments on “Baking Bread with the Romans: Part II – Panis Quadratus

  1. Leticia on said:

    What a great article! Thank you for this. So much information. I’ll be using the expression “gives good bread” as soon as I get a chance.

  2. Peter Burkimsher on said:

    larsiusprime at Hacked News suggests that the top and bottom were two separate balls of dough stacked on top of each other, explaining the groove.

    https://news.ycombinator.com/item?id=15726244

    The Byzantine Prosphora is similar. When Rome was sacked, people moved to Byzantium (imagine if California was bombed and people moved to New York). Byzantines still called themselves Roman. I think it’s probable that the same bread-making methods would transfer to their new capital.

    • Farrell Monaco on said:

      That’s a fantastic theory. There’s a lot to explore here and I’m going to post a follow-up in a week or two given the high level of engagement and debate around the prep and form of these iconic loaves. I’ll spesk to that theory as well. Stick around and thanks for reading and commenting! – Farrell

  3. Great article. Really enjoyed reading it. ?

  4. Could the string have been used as a way to ensure size consistency? The string would then be pulled off after baking and reused.

    • Farrell Monaco on said:

      Hi! This is the 6 million dollar question! I have been debating this with Dr. Ken Albala (University of the Pacific/Food History) as well. He feels that a circular pan lip made that lateral groove but I don’t think that’s the case; if you google images of Panis Quadratus you’ll see other loaves that show the bottom and the top of the bread are often the same size with a significant groove/indentation (in circumference) or the bottom portion of the loaf is sometimes larger. So no pan… I tend to think that it’s probably twine that’s being used because I think the pistrinae would’ve had to cool these loaves by the hundreds. Perhaps they were hung to cool? Perhaps the loaf was two slabs baked on top of each other? But then why only section the top slab? I definitely think they would’ve had size restrictions as grain was heavily regulated. But I don’t know if the lateral groove connotes a size specification. Thanks for chiming in on this! There’s more Roman bread posts coming soon. Cene bene! – Farrell

  5. This recipe was such fun to make. The kids loved getting thier fingers in helping make the bread. Trying to picke the next recipe from this site to make. Trying to find the tomatoe and rice one but still looking.

    • Farrell Monaco on said:

      Hi Don! Thanks! I’m really happy the kids enjoyed making this recipe. Here’s the stuffed tomatoes recipe you’re looking for: http://tavolamediterranea.com/2016/09/21/a-week-in-ravello-lemon-and-rice-stuffed-tomatoes/

      There’s a search window at the top of the site that can help you find recipes faster. Happy cooking! Farrell

  6. Traci Eaton on said:

    Having baked my own bread for four decades a couple things seem obvious to me. Tying the string around the loaf may well have been useful for cooling and storing the loaves as well as transporting them neatly and in an orderly and compact fashion to the customers who ordered them. The string groove also suggests that after breaking or cutting the wedges apart it would create a hinge like fold which would facilitate the opening of the wedge from the pointed end and filling it with some other food as if it was a small pie (sandwich). I like to imagine the children running out to meet their friends with a wedge of stuffed bread in their grubby little hands.

    • Farrell Monaco on said:

      Hi Traci! I think a lot about production volume as well when I consider that twine may have been used to transport and store the loaves. That’s a fantastic hypothesis about slicing guidelines too once the section has been broken out! Thanks for reading and offering your interpretations! – Farrell

  7. Kathryn Newill on said:

    Is it possible that instead of a single loaf, the dough was divided into smaller portions and then all tied together with twine to create a whole loaf out of parts? That would explain the divisions, and the groove from the twine.

    • Farrell Monaco on said:

      That is an excellent theory, Kathryn. There has been some conversation about this today on Facebook. Someone else also suggested ‘pull-bread’. I think it deserves some more research! It’s very puzzling and fascinating, isn’t it? – Farrell

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