1791 By SophieGreen Apr 13, 1791 Pope condemns civil constitution of the clergy Period: Jun 20, 1791 to Jun 21, 1791 Louis and his family are captured at Varennes after attempting to flee Jul 17, 1791 Massacre at the Champ de Mars: National Guard opens fire on demonstrators Aug 27, 1791 Declaration of Pillnitz Sep 14, 1791 King swears oath of allegiance to Constitution of 1791 Oct 1, 1791 Legislative Assembly convenes, replacing National (Constituent) Assembly Nov 9, 1791 Decree against émigrés issues (vetoes by king 12th Nov) Nov 29, 1791 Decree against refractory priests issued (vetoed by king 19th December)