He also composed another opera for Munich, Idomeneo in 1781. In March of that year, Mozart was summoned to Vienna by Archbishop von Colloredo, who was attending the accession of Joseph II to the. Idomeneo, re di Creta ossia Ilia e Idamante (Italian for Idomeneus, King of Crete, or, Ilia and Idamante; usually referred to simply as Idomeneo, K. 366) is an Italian language opera seria by Wolfgang Amadeus Mozart. Idomeneo, K.366 (Mozart, Wolfgang Amadeus). Idomeneo Idomeneus, King of Crete (tenor) Idamante Idamantes, son of Idomeneo (soprano castrato/tenor) Elettra Electra, Princess of Argos (soprano) Arbace Arbaces, Idomeneo's confidant (tenor) High priest of Neptune (tenor) Voice of the Oracle of Neptune (bass) Two Cretan women (soprano, mezzo soprano) Two Trojans prisoners (tenor, bass).