Block from a limestone frieze carved in high relief of Leda and the Swan, made from 400-500 AD, probably from a woman’s tomb at Oxyrhynchus, Egypt. It is now located in the Ashmolean Museum in Oxford, United Kingdom. (4032×3024) [OC]

Leda, wife of King Tyndaeus of Sparta, is raped by the god Zeus in the form of a swan. Two nymphs hold eggs, symbolising the conception of Leda's children Helen of Troy, Clytemnestra, and Castor and Pollux. This pagan myth remained popular in early Christian Egypt for memorials to fertile married women.

Here is information on the sculpture on the museum website: https://www.ashmolean.org/collections-online#/item/ash-object-451086