Handel's 1711 crusader opera Rinaldo, which pits the Christian Rinaldo against Argante, the Muslim King of Jerusalem, was the first Italian-language opera composed for the London stage. Handel composed the opera in just two weeks, aided by the recycling of much existing material - so much that it has been described as an "anthology" of his Italian period.
The Sibilar gli angui, an aria for solo trombone, was lifted completely from a dramatic cantata, and has a "ludicrously inappropriate" text for the bellicose Argante's grand Act I entrance; also from an earlier cantata.