Gismondo, rè di Polonia ossia il vincitor generoso ("Sigismund, King of Poland or the Generous Victor") is an opera (dramma per musica) whose libretto was written by Francesco Briani and with music composed by Leonardo Vinci.

The original libretto, written for Lotti's opera of the same name, is an homage to Frederick IV of Denmark lauding monarchic values and diplomatic virtues.

In the same spirit, Vinci's opera is dedicated to "Giacomo III, Rè della Gran Brettagna &c.", i.e. James Francis Edward Stuart.

But when the peace process is sabotaged Primislao believes Gismondo responsible for his public humiliation and the war starts again.

However it is revealed that Giuditta, Otone's sister, who, from the start, was secretly in love with Primislao, has rescued the latter and peace can now be made.