Blueprint of medieval cathedralThis 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 ...