Completed the following sentence: "Song for Athene" (also known as "Alleluia. May Flights of Angels Sing Thee to Thy Rest") is a musical composition by British composer John Tavener with lyrics by Mother Thekla, an Orthodox nun, which is intended to be sung a cappella by a four-part (soprano, alto, tenor and bass) choir. It is Tavener's best known work, having been performed by the Westminster Abbey Choir conducted by Martin Neary at the
funeral service of Diana, Princess of Wales, on 6 September 1997 as her cortège departed from Westminster Abbey.