Palazzo San Callisto

Palace of St. Callixtus
Palazzo di San Callisto (Italian)
Palace of St. Callixtus
General information
Architectural style	Baroque
Town or city	Vatican City - Trastevere
Country	Extraterritorial Property of the Holy See in Rome
Coordinates	41°53′20″N 12°28′14″E / 41.88889°N 12.47056°E / 41.88889; 12.47056
Current tenants	Dicasteries; Offices of the Roman Curia and of the diplomatic service of the Holy See; Catholic organizations; Residence of prelates and Roman Curia officials
Construction started	1609 (1609)
Owner	Holy See
Design and construction
Architect(s)	Orazio Torriani

The Palazzo San Callisto (also known as the Palace of Saint Callixtus) is a Baroque palace in the Trastevere neighborhood of Rome and one of the extraterritorial Properties of the Holy See.^[1] The original Palazzo is located in the Piazza di Santa Maria in Trastevere, the later extensions have their entrance in Piazza di San Callisto. The entire complex is one of the areas of the Holy See regulated by the 1929 Lateran Treaty signed with the Kingdom of Italy. As such it has extraterritorial status.

In the courtyard of the palace is the well where, according to tradition, Pope Callixtus I was martyred in the year 222.^[2]