1791 in architecture

	… 1781; 1782; 1783; 1784; 1785; 1786; 1787; ; 1788; 1789; 1790; 1791; 1792; 1793; 1794; ; 1795; 1796; 1797; 1798; 1799; 1800; 1801 …;
	Buildings and structures Art; Archaeology; Architecture; Literature; Music; Philosophy; Science; +...

The year 1791 in architecture involved some significant architectural events and new buildings.