It is a monument can be placed in the National Museum system. It consists of a small indoor environment by cruises. The walls and the vault are frescoed with episodes from the life of Christ painted by an anonymous late Gothic master in the first decades of the 15th century. A wrought iron gate of the 14th century, signed by Conte di Lello senese, divides the courtroom from the presbytery. The altar has a rich wooden Tabernacle, executed in 1529 by Vincenzo di Bastiano Carpenter and sculptor Luca, to host the revered Crucifix di Castelvecchio. Magazines of the Tabernacle are paintings by Francesco di Agnolo Lanfranchi said the PIN, brother of the renowned Andrea del Sarto.