Piazza dei Cavalieri di Malta (the piazza on the Aventine Hill designed by Giovanni Battista Piranesi in 1765 on the commission of the Grand Master of the Knights of Malta, the specific piazza whose design (the white obelisks, the emblematic Maltese cross decorations, and the enclosed garden enclosure walls) constitutes the only surviving example of Piranesi's architectural design built in Rome (Piranesi (1720-1778) was primarily an engraver and architectural theorist whose "Carceri d'Invenzione" imaginary prison prints and the "Vedute di Roma" documentary engravings are among the most influential works in the Western architectural imagination, but who built almost nothing in his actual architectural practice)): the specific Piranesi program (the symbolic program of the piazza, the obelisks as the Maltese Order's military and spiritual authority, the iconographic elements from Maltese heraldry, and the specific enclosed garden that the Order's extraterritorial status in Rome required).
The keyhole view: the Buco della Serratura (the keyhole, the specific keyhole in the green painted garden gate of the Priorato di Malta (the Knights of Malta priory at the southern end of Piazza dei Cavalieri di Malta)): the optical illusion (looking through the keyhole: the perfectly circular aperture of the keyhole frames the priory garden's hedge-trimmed circular alley, whose perspective the hedge-cutters maintain in the specific alignment that makes the dome of St Peter's Basilica (2km away across the Tiber) appear at the end of the garden alley as a perfectly centered circle within the keyhole circle): the specific three-jurisdiction simultaneity that the view produces (the viewer standing in the Aventine Hill (Rome), looking through the gate of the Sovereign Order of Malta's territory (a sovereign entity recognized by 117 states, with its own passport and currency), through the garden aligned across the Gianicolo (Rome), toward St Peter's dome (Vatican City State, a separate sovereign state)): three sovereign territories visible in one keyhole view.
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Piazza dei Cavalieri di Malta: Keyhole, Piranesi, and Aventine Circuit
The Keyhole Practical
The keyhole visit practical (the specific logistics of the most photogenic 3 seconds in Rome tourism): the queue (the keyhole is Rome's most specifically queued non-museum attraction, on weekend afternoons (12:00-17:00) the queue extends along the Via di Santa Sabina for 50-150 people, the wait approximately 15-40 minutes for the 3-second view): the queue avoidance (arrive before 9:30am or after 17:30 for the minimum wait. The early morning visit is by far the most rewarding, the empty Piazza dei Cavalieri di Malta in the morning light is the complete Piranesi experience without the afternoon tourist management): the photography (the keyhole view requires a medium or wide-angle smartphone camera held at the keyhole level, the full dome is visible through the keyhole at the standard phone camera field of view, the photo works best in the late afternoon light when the western sun illuminates the dome from the front): admission free (the piazza and the keyhole are publicly accessible at all hours).
Piazza Dei Cavalieri Di Malta: tours & tickets
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See availability & prices →Compare tours on Viator →We may earn a commission, at no extra cost to you.The Piranesi Piazza Design
Piazza dei Cavalieri di Malta Piranesi design elements (the specific 1765 program): the six white obelisks (the emblematic Piranesi obelisks, the specific decorative program that places the obelisk (the Egyptian-Roman monumental form that Piranesi's engraving work had made him intimately familiar with) in the service of the Maltese Order's authority symbolism): the shield decorations on the enclosure walls (the specific Maltese cross and anchor combinations that reference the Order's naval military history): the overall effect (the specific enclosed piazza, entirely surrounded by walls except for the gate, whose Piranesi decoration transforms the functional enclosure into the most deliberately theatrical single small space in Rome).
Q&A: Piazza dei Cavalieri di Malta
Can I enter the Priory of the Knights of Malta?
No, the Priorato di Malta (the Knights of Malta priory building and its garden (the garden visible through the keyhole)) isn't accessible to the public (it is the official seat of the Sovereign Military Order of Malta in Rome and functions as the Order's government and diplomatic mission, not as a museum or a tourist site): the only public access to the priory territory is the keyhole view from the public piazza. The Knights of Malta organization operates guided visits to specific areas of the priory on the occasion of the annual "Giornate FAI" (the Fondo Ambiente Italiano national open days in March and October), register at fondoambiente.it for the 2026 FAI open day schedule which sometimes includes the Priorato di Malta interior.
Internal Links
- Aventino: Il Buco e il Giardino degli Aranci
- Il Buco della Serratura: Come Fotografare la Cupola
- Piazza dei Cavalieri in Inverno: Zero Fila
- Piranesi Roma: Il Progetto dell'Aventino
- Roma Nascosta: I Tre Paesi in Una Serratura
- Priorato di Malta: Giornate FAI 2026
- Come Arrivare all'Aventino: Metro B Circo Massimo
