First employed in the house of Prince Lobkowitz in Vienna, Gluck accompanied the court to Milan where he studied with Sammartini. A growing reputation as a composer of opera earned Gluck an invitation (1745) to London writing for the Haymarket Theatre. When Handel cynically advised Gluck that his works had not pleased the public, he traveled to Paris where he was very much influenced by the operas of Rameau. From 1755-61 Gluck was in Vienna where he began his important work of reforming opera seria along the more dramatic lines suggested in Marcello'sTeatro alla moda (1720). Gluck's contribution to opera is in the development of an international style combining the best traits of Italian, French, and German schools.