In which decade was Benjamin Britten's opera "Gloriana" first performed?

"Gloriana", Op. 53, is an opera in three acts by Benjamin Britten to an English libretto by William Plomer, based on Lytton Strachey's 1928 "Elizabeth and Essex: A Tragic History". The first performance was presented at the Royal Opera House, London, in 1953 during the celebrations of the coronation of Queen Elizabeth II. "Gloriana" was the name given by the 16th-century poet Edmund Spenser to his character representing Queen Elizabeth I in his poem "The Faerie Queene". It became the popular name given to Elizabeth I. It is recorded that the troops at Tilbury hailed her with cries of "Gloriana, Gloriana, Gloriana", after the defeat of the Spanish Armada in 1588.

Edward Benjamin Britten, Baron Britten (22 November 1913 – 4 December 1976) was an English composer, conductor, and pianist. He was a central figure of 20th-century British music, with a range of works including opera, other vocal music, orchestral and chamber pieces. His best-known works include the opera "Peter Grimes" (1945), "War Requiem" (1962) and the orchestral showpiece "The Young Person's Guide to the Orchestra" (1945).