Answer: Saint John's Tower (Italian: Torre San Giovanni) is a round structure located on a hilltop in the western most tip of Vatican City and overlooking the Vatican Gardens. The Medieval tower is located along an ancient wall built by Pope Nicholas III. In the 16th century, it fell into disuse but was rebuilt by Pope John XXIII in the early 1960s. It is the seat of the Secretariat for the Economy and is used by the Pope when maintenance work is being done on the Apostolic Palace.


St. John Tower
Scott # 601 (1976)