In the heart of Tivoli, in what is now Piazza Garibaldi, about an hour’s drive from San Vito Romano, stands Rocca Pia, the imposing square fortress commissioned by Pope Pius II Piccolomini in 1461. The pontiff had it built to assert the Church’s authority over a town scarred by centuries of feuding factions, in particular the Colonna and Orsini families, who fought for control of Tivoli.
The building, attributed to the architect Francesco di Giorgio Martini or his circle, is a compact brick block reinforced at each of its four corners by battered cylindrical towers, designed to withstand the rapidly evolving artillery of the time. The fortress was originally surrounded by a moat that could be filled with water and linked to the town by a drawbridge, defensive features that made it one of the most advanced fortifications of its time in the Papal States.
Over the centuries the fortress gradually lost its military role, becoming the seat of the local garrison and, more recently, the town prison, a function it retained until the 1980s. Its stark, austere appearance, devoid of any decoration, faithfully reflects the purely defensive and repressive purpose for which it was conceived.
Today Rocca Pia, not open to visitors inside except during exhibitions and events, remains one of the most recognizable landmarks on Tivoli’s skyline, and provides a striking backdrop for town events such as the “Tivoli in Fiore” flower show.
Opening hours and contacts
We have not found up-to-date official opening hours for the Rocca Pia. The fortress normally opens at weekends and on some public holidays, with limited numbers per visit, but days and times have changed several times in recent years: before setting off, it is best to ask the Municipality of Tivoli for confirmation.
Phone: +39 0774 4531 (Municipality of Tivoli)
Address: Vicolo Barchetto, Tivoli (Rome)
Source for contacts: Lazio Nascosto - Rocca Pia (checked in October 2026).
Source: Comune di Tivoli, Tivoli Civic Museum System.