At the heart of the palazzo on the second floor is a magnificent Council Chamber with an imposing cross-vaulted ceiling. This is decorated with a fresco of The Annunciation and the Four Saints - Cosmos, Damian, Ottaviano, and Giusto painted by Jacopo di Cione and Nicolò di Pietro Gerini. When the fresco was being transferred onto canvas at a later date the sinopia or original sketched outline was discovered and this is now displayed in the antechamber.
