In May 1244, he was created cardinal deacon of S Giorgio in Velabro, and subsequently donated land next to its tower.
A purported miraculous event occurred regarding an image of the Virgin Mary at the well in the adjoining stable yard.
Pope Innocent IV directed Capocci to build a chapel to commemorate the event.
[1] In 1259, Capocci bequeathed a good part of his fortune to build a hospital to house the sick suffering from skin diseases and in particular from the so-called 'St Antony fire'.
The rector enjoyed a special privilege that allowed him to attend the papal table and take away the leftovers for the benefit of the patients.