A Neoclassical style of architecture inspired by and incorporating features of ancient Greek temples.  The Greek Revival style was at its height of popularity in Europe and the US between 1825 and 1860. The term was first used by Charles Robert Cockerell in a lecture he gave at the Royal Academy of Arts in London in 1842. Web resource here.

Temple Row at Sailors Snug Harbor, Staten Island, New York. 1833. Photo: Dmadeo.