The earthly remains of Francesco Datini are laid to rest at the altar's steps. There's a pretty tomb erected after 1460 by Bernardo Rossellino on the left wall. Off the cloister (also accessible through a door in the sacristy) is the Cappella Migliorati, entirely frescoed in 1395 by Niccolò di Pietro Gerini with the lives of St. Anthony Abbot and St. Matthew played out in medieval Technicolor around a large Crucifixion.