The identity of this lightly bearded man is unknown, though his clothing suggests that he is of a religious background (priest?). The original marble, now housed in the State Museums, was creted in Florence, Italy around 1470.
Further reading: Bode & Tschudi 1888, 24 no. 67, Plate VII. – Ej Planiscig, L., “Bernardo and Antonio Rossellino”, Vienna 1942.