After50 yearsthe crypt of leonardois open it is the most ancient underground church in milan built on the site of the roman forum the crypt of santo sepolcro also called the crypt of leonardo da vinciwas founded in 1030 and was dedicated to the holy trinity it was rebuilt for the first time in 1100 as san sepolcro church and has experienced many modifications over the years leonardo da vinci was fascinated by the beauty of the crypt and in tracing his birds eye view map of milan took