Which opera Die Entführung aus dem Serail or Thaïs was originally performed first ?
Die Entführung aus dem Serail: Die Entführung aus dem Serail (K. 384; The Abduction from the Seraglio; also known as Il Seraglio ) is an opera Singspiel in three acts by Wolfgang Amadeus Mozart. Die Entführung aus dem Serail:  The work premiered on 16 July 1782 at the Vienna Burgtheater, with the composer conducting. Thaïs (opera):  It was first performed at the Opéra Garnier in Paris on 16 March 1894, starring the American soprano Sibyl Sanderson, for whom Massenet had written the title role.
Die Entführung aus dem Serail