The Aventine Hill, a short walk south of the Colosseum, is one of the seven hills on which Ancient Rome was built. And on top of the Aventine Hill, in the Piazza of the Knights of Malta, there’s a quirky little phenomenon known as the ‘Secret Keyhole’.

The surprise is not the keyhole itself, but what can be seen through it. By design or by accident – no one is quite sure – the keyhole affords a perfectly-framed view, through a garden, to St Peter’s Basilica on the other side of the city.

The door in which the keyhole sits seems ordinary enough, though the building behind the door is anything but. Built as a palace in the 1st century, it became the seat of the legendary Knights Templars in the Middle Ages, then in the 1400’s, it passed to the Knights of Malta (i Cavalieri di Malta) who still occupy it today.

As for St Peter’s, it turns out there are actually four major ‘Papal Basilicas’ in the Catholic faith, and all four are right here in Rome.

 

The Secret Keyhole
St Peter's Basilica
Santa Maria Maggiore
San Giovanni in Laterano
Basilica of St Paul Outside the Walls