|Built, as was the Elian bridge in front, by the Emperor Hadrian (117-138) as a Mausoleum for himself and his successors, it was completed by Antoninus Pius in 139. In 271, the Emperor Aurelian incorporated the pile into the defence system he designed: it lost its function as a tomb to become a fortress.
In 1277 it was occupied by Nicholas II who connected it to the Vatican by the famous corridor, a safety passage which runs along the top of the encircling wall of the
|Lungotevere Castello, 50|
|9 a.m.-3 p.m.; closed on II and IV Tuesday of the month|