Serse January, the third by 6 February, and Handel put the finishing touches to the score on 14 February. "Serse" was first performed at the King's Theatre, Haymarket on 15 April 1738. The first production was a complete failure. The audience may have been confused by the innovative nature of the work. Unlike his other operas for London, Handel included comic ("buffo") elements in "Serse". Although this had been typical for 17th-century Venetian works such as Cavalli's original setting of the libretto, by the 1730s an "opera seria" was expected to be wholly serious, with no mixing of the genres of
The Royal Opera were, according to the "Frankfurter Allgemeine Zeitung", "beside themselves with enthusiasm". In 1968, on the recommendation of the Home Secretary, James Callaghan, the Queen conferred the title "The Royal Opera" on the company. It was the third stage company in the UK to be so honoured, following the Royal Ballet and the Royal Shakespeare Company. Webster retired in June 1970. The music critic Charles Osborne wrote, "When he retired, he handed over to his successor an organization of which any opera house in the world might be proud. No memorial could be more appropriate". The successor was Webster's former assistant,