Sancta Sanctorum (Lateran, Rome)

This article is about the chapel. For the term sancta sanctorum, see Holy of Holies and Sanctum sanctorum.
Main altar of the Sancta Sanctorum, enshrining the Uronica.

The Sancta Sanctorum (Italian: Chiesa di San Lorenzo in Palatio ad Sancta Sanctorum) is a Roman Catholic chapel entered via the Scala Sancta (Holy Staircase) of the Lateran Palace in Rome. It was the original private chapel of the papacy before it moved to Avignon, and later to the Vatican Palace. The chapel is the only building from the old Lateran Palace that was not destroyed during its reconstruction.