Pope Sergius I
Its name refers to the martyr Adrian of Nicomedia. Paintings are still visible in a side chapel which depict scenes from the life of St. Adrian; there are also some Byzantine paintings. It was designated by Pope Sergius I (687-701) as the starting point for the litanies during certain the procession liturgical feasts of the Virgin Mary, Presentation in the Temple, Annunciation, Assumption and Nativity. Pope Gregory IX made substantial changes to the building in 1228. In the 17th century its large bronze doors were moved by order of Pope Alexander VII to adorn the main portal of the Basilica of St. John Lateran.