Nous traçons et mesurons avec la corde à 13 nœuds

In the Middle Ages, stonemasons and carpenters mastered geometry. Before building an arch, a vault, or a timber truss, they traced the work to be completed in life-size. In the castle courtyard, discover how to draw a right angle, a semicircular arch, or an equilateral pointed arch with a simple rope, and bridge the gap between music and mathematics!