The façade, which has two arches either side of the doorway, adopted a coat of white limestone, which remained incomplete, and was completed only in the 20th century.
To the right of the main altar is the monument to Ugolino Visconti, Governor of Pisa, judge of Gallura in Corsica.
He is encountered by his friend Dante Alighieri in Purgatory, awaiting entry to heaven.
Among the paintings is a Noli me Tangere by Domenico Passignano and a Nativity by Federico Zuccari.
[3] The panel of Bishop Saint and Saint Francis of Assisi by Francesco di Andrea Anguilla was part of a triptych commissioned for the convent; it is now in the collection of the Birmingham Museum of Art.