Most visitors go to Ravenna to see the beautiful mosaics of the Basilica di San Vitale, unaware that just a few footsteps away, within the grounds of the church, lies a splendid cruciform mausoleum. The Mausoleum of Galla Placidia (AD 425–30) is decorated with some of the earliest and most fabulous mosaics in Western art.
Heavenly blue covers the ceiling, and the Apostles are all represented, while over the door a Christ-figure sits in a country setting guarding his flock. The window panes are made of stone panels so thin that light seeps through them.
The Mausoleum of Galla Placidia is a Late Antique Roman building in Ravenna, Italy, built between 425 and 450. It was added to the World Heritage List together with seven other structures in Ravenna in 1996. Wikipedia