Much of what we know about medieval building techniques is due to the so-called sketchbook of Villard de Honnecourt. We know very little about Villard himself, other than his name, and the fact that he lived in northern France in the thirteenth century. But his sketchbook (perhaps better called a "portfolio"), is packed full of drawings of details of the buildings going up around him. It also includes images of people, animals, siege engines (catapults and trebuchets) and an idea for a perpetual motion machine.
The image above shows a detailed rendering of a clock tower.
The portfolio is divided into several sections, sculpture, architectural features, masonry, and so on. However, it is clear that some pages that were originally part of it are missing. Architectural historians now think that the missing section was on carpentry. Nonetheless, the parts that we do have include so much detail on how pieces of wood can be used and how they are attached together that it seems likely that Villard himself was primarily a carpenter.
The portfolio is a great boon to historians of medieval architecture, because we basically now have 800 year old buildings that have had 800 years of rebuilding and "improvement," so that it's almost an archeological exercise to figure out all the original details. But Villard gave us, for example, the layout/floor plan of Cambrai cathedral while it was still being built, so we know exactly what the original architect intended.
Modern builders can also learn thirteenth-century techniques from the portfolio. There are a number of sketches of Reims cathedral, which was brand new at the time. The detailed drawings would have been a boon to the builders restoring the cathedral after it was gutted during World War I.
Other aspects of the portfolio pique our interest for different reasons. He included a drawing of a lion (with a sketch of a porcupine off to the side).
In the caption Villard notes that he has drawn the lion "from life." Okay, we ask, where did someone hanging out in northern France see a lion? One has to assume it was in a cage, or Villard, standing right in front of it with his parchment and pen, wouldn't have been able to do a nice drawing. Most likely this lion had been captured in Africa (maybe as a cub?) and sent along the trade routes until it ended up with some rich person, who kept it as a curiosity. There were plenty of heraldic lions in the Middle Ages, used as signs of boldness and strength, but they didn't look as concerned as this lion seems to (and I'm not at all sure lions have eyebrows).And let's not forget his perpetual motion machine, where a series of mallets would theoretically keep a wheel turning indefinitely once it was given a push. (In fact it would not have worked in the thirteenth century any better than it would now.)
The portfolio is available in facsimile with commentary by Carl F. Barnes, The Portfolio of Villard de Honnecourt (Ashgate, 2009).
© C. Dale Brittain 2025
For more on medieval art and architecture, see my ebook, Positively Medieval: Life and Society in the Middle Ages. Also available in paperback.