The Vatican obelisk was carved during the reign of Nebkaure Amenemhet II (1992-1985 BCE), and originally stood in the Temple of the Sun at Heliopolis. The Roman emperor Caligula brought it to Rome in 37 CE as one of many tokens of the Roman conquest of Egypt, and had it erected on the spine of his eponymous circus, later renamed for Nero.
In 1585, Pope Sixtus asked Domenico Fontana to move the 330-ton Aswan granite the quarter mile or so to St. Peter's Square. The operation was carried out using hemp ropes and iron bars weighing 40,000 pounds, plus 900 men and 72 horses, and took about 5 months to complete, captivating the city's populace.