Saint John's Tower (Vatican City) Saint John's Tower (Vatican City) Saint John's Tower () is a round structure located on a hilltop in the westernmost tip of Vatican City, near Vatican Radio and overlooking the Vatican Gardens. The Medieval tower is located along an ancient wall built by Pope Nicholas III, but it fell into disuse at the beginning of the 16th century. It was rebuilt by Pope John XXIII in the early 1960s. In modern times, the Tower houses papal apartments used by popes when maintenance work is being done on the Apostolic Palace and also is reserved for illustrious guests of the Pontiffs.
Prophecy of the Popes called "Purported prophecies", that the high level of accuracy of the alleged prophecies up until the date they were published, compared with their high level of inaccuracy after that date, is evidence that they were created around the time of publication. The prophecies and explanations given in Wion correspond very closely to a 1557 history of the popes by Onofrio Panvinio (including replication of errors made by Panvinio), which may indicate that the prophecies were written based on that source. One theory to explain the creation of the prophecies, put forward by 17th-century French priest and encyclopaedist Louis Moréri, among