Alessandro Peretti di Montalto

Alessandro Damasceni Peretti di Montalto (1571 – 2 June 1623) was an Italian Catholic Cardinal Bishop.

He served also as Vice-Chancellor of the Holy Roman Church (1589–1623) and Cardinal Protector of the Kingdom of Poland (named on 19 September 1589 by King Zygmunt III Waza) and of the several religious orders.

His primary works as a great patron were the Villa Lante at Bagnaia, where he contributed to the gardens a casino matching the earlier one, and the church (though not the facade) of Sant'Andrea della Valle in Rome, (begun in 1591), where Carlo Maderno constructed at the Cardinal's personal expense the second-largest dome in Rome, 1608 to 1621.

As a cardinal, Peretti lived an extravagant lifestyle in which he indulged his taste for music and lavish theatrical productions staged in his residence, the Cancelleria palace.

Surviving books from Cardinal Alessandro's library reflect pride in his relationship to the Pope through elaborate armorials and his perfect taste.