This pillar may be either votive or sepulchral. The snake is both an attribute of the healing god Asklepios, suggesting this object may have been a thank offering on behalf of one cured of an illness, and a potent symbol of the underworld, alluding perhaps to a funereal function. The wreath, meanwhile, evokes victory in the broadest sense, as well as the realm of Dionysos, whose mythological rebirth makes his iconography particularly appropriate in a tomb context.
Said to be from Delos
Richter, Gisela M. A. 1954. Catalogue of Greek Sculptures. no. 234, p. 115, pl. 141b, Cambridge, Mass.: Harvard University Press.