Teseo is an opera seria with music by George Frideric Handel, the only Handel opera that is in five acts. The Italian-language libretto was by Nicola Francesco Haym, after Philippe Quinault's Thésée. It was Handel's third London opera, intended to follow the success of Rinaldo after the unpopular Il pastor fido.

Fritz Lehmann was a noted German conductor, whose career was cut short by his early death at the age of 51. His repertoire ranged from the Baroque through to contemporary works, in both the concert hall and the opera house. He was an early advocate of period performance practice. and founded the Berliner Motettenchor. He is best known through a number of recordings he left.