Blueprint of medieval cathedral
This is cool. The top image shows a drawing on parchment from the 1260s. It is one of the earliest existing architectural drawings and depicts the façade, or front, of Strasbourg Cathedral in France. The “blueprint” almost stands a meter tall. What’s so special about this medieval artifact is that it still exists: single sheets rarely survive from the Middle Ages (with the exception of charters). Equally special is that we can compare the drawing to the real thing (lower pic): it is not hard to recognize the big round window in both drawing and real building - note also the door underneath it and the pointy window to the right. How great that we are given a peek on the medieval architect’s drawing board. Ironically, he did not live to see his creation built, because the cathedral was finished in the 14th century.