The entrance to this church is an unassuming, unnumbered door on Borgo Pinti that opens onto a pretty cloister designed in 1492 by Giuliano da Sangallo, open to the sky and surrounded by large pietra serena columns topped with droopy-eared Ionic capitals. The interior of the 13th-century church was remodeled in the 17th and early 18th centuries and represents the high baroque at its restrained best. At the odd hours listed below, you can get into the chapter house to see the church's hidden main prize, a wall-filling fresco of the Crucifixion and Saints ★ (1493-96) by Perugino, grand master of the Umbrian school. Typical of Perugino's style, the background is drawn as delicately in blues and greens as the posed figures were fleshed out in full-bodied volumes of bright colors.