Spreading Golden Wings (1985)

Vittorio is the young lord of Il Lago, which is always at war with Bolzano, a neighboring city-state of Northern Italy. In one conflict, Vittorio kills the old lord of Bolzano, and takes his daughter Clarice prisoner. Clarice is actually the bastard daughter of the old lord, and expects Vittorio to be a fat old man. She's rather surprised when she sees the real Vittorio. Vittorio, to everyone's shock, orders an immediate wedding.