Apostolic Palace in Vatican City

You're standing by the Apostolic Palace, where the Pope lives and works. From the square, look to the right, over the colonnade. That big, square and rather stern building is the palace of Pope Sixtus the Fifth. His architect, Domenico Fontana, built it between 1586 and 1589, deliberately plain. It's only one part of a much larger whole: together, the Vatican palaces have around fourteen hundred halls and rooms.