Apr 17 First Unitarianism church service in England held by Theophilus Lindsey at the Essex Street Capel in London Music Premiere Apr 19 Christoph Willibald Gluck's opera "Iphigénie en Aulide", based on the play "Iphigenia in Aulis" by Euripides premieres in Paris Greek Playwright Euripides Apr 30 Pope Clement XIV proclaims a universal jubilee for the second time Mar 1774 Historical Events by Year May 1774 Famous People Who Were Admirals Aviators Gangsters Generals Industrialists Suffragists