This is a replica of a marble lion’s head rhyton fragment which was found at Delphi. It is unclear whether it was deposited in the Bronze Age or as part of the later cult.
Bibliography
Evans, Arthur. 1928. The Palace of Minos at Knossos, II, p. 833, fig. 549
Myres, John (ed.). 1936. British Archaeological Discoveries in Greece and Crete 1886-1936, p. 18