supposed to be the most beautiful Renaissance monument in Cortona. It is named after the old limestone quarry (calcinaio) which was owned by the shoemakers guild. The church is considered as the masterpiece of Francesco di Giorgio Martini. It was built between 1485 and 1513 on the plan of a Latin cross with a eight-sided dome above it. The stained windows are the work of William of Marcillat, the main portal and high altar were designed by Bernardino Covatti of Cortona.