Arbace is an opera seria in three acts by Francesco Bianchi.

The opera was forward looking in its structure, with tension gradually mounting, via an exciting prison scene ("a fore-shadowing of romanticism"[1]) to a considerable climax.

Marita P. McClymonds remarks on "The use of tonality, modality, chromaticism and strong dynamic contrasts for expressive purposes, as well as the liberal use of wind instruments ..."[1] The opera was first performed at the Teatro di San Carlo in Naples on 20 January 1781.

Arbace's wife Semiri is in the hands of the lascivious Assyrian tyrant Scitalce.

Eventually they are rescued by Idaspe, Scitalce dies in a conflagration, and Arbace becomes the new ruler of Assyria.