This fine bust depicts a woman in armour, likely Minerva.
In the Venetian area this kind of object adorned furniture drawers or functioned as a door knob. Certainly, it was part of a series that followed the same theme.
Literature: Mark Gregory d'Apuzzo, La Collezione dei Bronzi del Museo Civico Medievale di Bologna - Libro Co., San Casciano Val di Pesa, 2019?, pp. 159-151 per esempio simile.