Pistoia's barnlike Franciscan church contains lots of good 14th-century frescoes, the best of which are in the transept chapels. Behind the high altar is a fresco cycle on the Life of St. Francis by a Giotto copycat (perhaps a student) who mimicked his master's formulae for most of the scenes. The chapel to the left has a Sienese cycle of an Allegory of the Triumph of St. Augustine. After giving a nod to the frescoes in the second chapel to the right of the high altar, go through the door at the transept's end for a peek at more 14th-century works in the sacristy. If it's open, pass through the door into the chapter house beyond for even better frescoes, including a giant Tree of Life that just might be by the hand of Sienese master Pietro Lorenzetti.