The people who had invited Piccinni to Paris were people who did not like Gluck’s music. They wanted Piccinni to be a rival to Gluck. They enjoyed arguments, and they wanted to try to make the two composers enemies. There were a lot of arguments between the people who supported Piccinni and those who supported Gluck. The whole affair is often called: the war between the Piccinnists and the Gluckists. It was very stupid, because the arguments had nothing to do with music. Both composers were asked to compose an opera about the same story: Roland. Gluck never finished the opera because he wanted to finish his career by writing Alceste. He did not want to be compared to Piccinni. Then both composers were asked to write operas about the story "Iphigénie en Tauride" . Gluck’s opera was first produced on 18 May 1779. Piccinni's "Iphigénie" followed on 23 January 1781. The rival parties went on arguing, even after Gluck left Paris in 1780. Then some people tried to get a new rival for Piccinni: they invited Sacchini to Paris. But Piccinni continued to be popular. When Gluck died, in 1787, Piccinni suggested that a public monument should be built to his memory. Gluck’s supporters refused to support the idea.