Sarcophagus with Cross and Temple Veil

5th to 8th century
Stone
Basilica of Sant'Apollinare in Classe, Ravenna, Italy

The frontal depicts two round arches supported by columns flanking a larger arch supported by identical columns and itself supporting an entablature and pediment with two acroteria. Each arch frames a cross and the central cross is further framed by a pair of curtains as in a temple. The side crosses have small "tails" at the top, perhaps alluding to the staurogram symbol.

This image in full resolution
View the left end of the sarcophagus, with the Lamb of God
View the right end of the lid, with peacocks eating grapes

More of the staurogram symbol
More of crosses and crucifixes

Photographed at the basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.