Chancel
Behind the main altar we find the work of Agnolo Gaddi (c.1350-1396), frescos depicting The Legend of the True Cross, the legend of the wood from the Garden of Eden becoming the Cross on which Jesus Christ was crucified, as it comes to us in the stories told in the book a Golden Legend. The book sought to compile traditional lore about all of the saints venerated at the time of its compilation (1280) and was considered a medieval "best seller" even out selling the Bible at one point. You can read the story as if it were a "fumetti" or portrayed in a comic book fashion; blocks of images that can be "read" starting from the top of the right hand wall to the bottom.