Church of St Mary of the Priory : Piazza dei Cavalieri di Malta, 4, 00153 Roma RM, Italy

Santa Maria del Priorato is the final resting-place of the Venetian print-maker and architect Giovanni Battista Piranesi (1720-78), who designed the church. …

Stunning monument of history, architecture and culture. Inside the church you are going to find splendid tombs of Grand Masters and Grand Priors of the Order of the Hospital of Saint John of Jerusalem better known as the Order of Malta nowadays. This is another must see place at Rome.

It's a sweet church, with a lovely park at side. But if you, like me, are trying to get an amazing view from the keyhole, it is not here, not inside this church. Go down the street a little bit, the place named Il Buco della serratura is actually what you're looking for. Normally, it will a line of people waiting there.