The facade dates back to 1467, as shown on the upper frieze, and is covered by pink and white marble in four horizontal bands. The lower part of five large arches, with the middle one containing the main door, the surround of which was built in 1782 by Calderari.
The second band is divided into five parts by pilaster strips, with a central rose window, the third is free of detail, whilst the fourth, built in 1950, replaces the pediment destroyed by a hurricane in 1581.


