The palace was built in the second half of the 18th century by the architect Domenico Simonetti of Como as a College of the Doctrinaires to support the activity of the cathedral. The construction was made possible thanks to an inheritance even if the cost of the structure exceeded the funds avvailable and the Doctrinaires found themselves with debts.
The palace consists of a central body and two wings that enclose a cloister open on one side, perhaps an indication of the lack of sufficient funds to finish the work.
The facade is simple, 35 metres long with regular windows on three floors and opens onto a square supported by polygonal walls from which you can enjoy a splendid view of Monte Lupone.
As soon as you pass the entrance door framed by stones you enter an atrium with a wide staircase leading to the upper floor.
On March 7, 2003 a sundial was drawn on the façade, by the expert in gnomonic passages Umberto Mascolo di Sermoneta, with the inscription: “Diem et horam excidii Nonis Martiis number” in memory of the air raid of 1944.