The Sancta Sanctorum chapel (Italian: Chiesa di San Lorenzo in Palatio ad Sancta Sanctorum) is a chapel entered from the Scala Sancta (holy staircase) of the Lateran Palace, Rome. The artwork of the Sancta Sanctorum in Rome was the basis for the art at Assisi. The chapel is the only building from the old Lateran palace that was not destroyed during its reconstruction. It was the original private chapel of the papacy before it moved to Avignon, and later to the Vatican palace.