The Archiepiscopal or St Andrew’s Chapel (Capella Arcivescovile o di Sant’Andrea) was the private oratory of the bishops of Ravenna. It was constructed around AD 500 with the mosaics dating from the same period.
The mosaics feature strong anti-Arian iconography as the Latin Orthodox clergy were generally keen to distinguish themselves from the Ostrogothic Arian rulers, who settled in Ravenna during Late Antiquity. The main lunette features Christ as a warrior. Christ is dressed like a victorious emperor standing on the beast and a snake. The vault mosaics almost resemble a carpet or tapestry of birds and patterns.