In 1519 Giovanni Corrado Orsini, lord of Bomarzo, commissioned the Sienese architect Baldassarre Peruzzi to design a new palace on the structure of a wing of the town's old castle.

The following year, following the second marriage of Gian Corrado to Clarice Orsini, the work received new impetus under the direction of Peruzzi himself and his half-brother, the painter Pietro Antonio di Andrea.

[3][2][1] In 1645 the nobleman Ippolito Lante della Rovere took over the feud of Bomarzo and with it the palace, because of some debts contracted by the Orsini family.

[3] After modifying it with the construction of the hall on the first floor, he had the Allegory of War and Peace painted there between 1660 and 1661, a large fresco by Lorenzo Berrettini, son of Pietro da Cortona.

[3][2][1][4] The works commissioned by the Lante also include the Scaletta or Scala Segreta and the remodelling of the chapel, in whose altar the remains of San Moderato, a local saint who lived in the 17th century, were placed.