Sibylla Sambetha (or simply Portrait of a Young Woman) is a small oil on oak panel painting by the German-Flemish painter Hans Memling.

Today her dress is dark purple or black—the colours have darkened from their original blue—with a white collar above a red bodice.

[1] The frame's lower border containeds a carved banderole with an inscription reading SIBYLLA SAMBETHA QUAE / EST PERSICA; associating the woman with the Persian Sibyl.

[5] The scroll at the end of the frame bears another later addition, the text of which refers to Mary with the words ECCE BESTIA CONCVLCABERIS, GIGNETVR D(OMI)NUS IN ORBEM TERRARVM ET CREATUM VIRGINIS ERIT SALVS GENTIVM, INVISIBILE VERBV PALPABITVR (Here let the serpent be trampled under your talon, let the Lord be born in the earthly realm, and the V|irgin's creation will become the world's salvation: the invisible word will be made palpable).

[2] The woman's identity is unknown, although there have been some attempts by art historians to identify her as Willem Moreel's daughter Mary.