La fedeltà premiata (Fidelity Rewarded) is an opera in three acts by Joseph Haydn first performed at Eszterháza on 25 February 1781 to celebrate the reopening of the court theatre after a fire. It was revised for a new version first performed in 1782.
The main opera house adjoining the palace at Eszterháza had been destroyed by fire in November 1779; La fedeltà premiata, composed in 1780, inaugurated the new state-of-the-art theatre in the grounds which opened after major delays 15 months later. The opera was written during the most prolific period of Haydn's operatic composition between 1773 and 1783 when he composed eight Italian operas.