George Frideric Handel’s Giustino, HWV 37 has an Italian language libretto, the origins of which lie in one created by Nicolò Beregan in 1682. That was first set to music by Giovanni Legrenzi the following year, and was subsequently used by Tomaso Albinoni in 1711 (though his opera is now lost) and Antonio Vivaldi in 1724. The version that Handel used had been adapted from Beregan by Holy Roman Emperor Charles VI’s court poet Pietro Pariati in 1711.  The opera...