The building's current appearance, a majestic palace-castle, was given to it by artists of the Vignola school: inside there is still an imposing ramp that allows carriages to reach the ground floor.
Numerous rooms, terraces, corridors, covered passageways and 365 windows (one for each day of the year) characterise the castle, also called the Ducal Palace or Mattei.
Some rooms are decorated in the Mannerist style with frescoes by Domenichino, Orazio Alfani and Paolo Veronese.
To date, the building has changed hands several times.
WIKIPEDIA