The Apollo of Belvedere is a fragile marble. Its last restoration dates back to the 1990s, when its internal framework was completed and repaired.
The last intervention actually somewhat weakened one of the legs of this beautiful walking god. A cardinal, Giuliano Della Rovere, bought the Apollo and placed it in the garden of his palace, Place des Saints-Apôtres. Then, when he became pope under the name Julius II (1503-1513), he moved it to Vatican Hill, hence its name.