1. The work of certain Neo-Classical architects, notably Boullée, Ledoux, and Lequeu. Boullée's gigantic schemes for cenotaphs and monuments were noted for their scale and stereometrical purity, while Ledoux's proposals for an ideal city, Chaux, contained many buildings that were expressive of their purpose (architecture parlante).
2. Any imaginary scheme featuring fantastic futuristic structures, of which there were many in C20.
Anno Domini, xxxi/5 (May 1961), 181–2;
Belov et al. (1988);
E. Kaufmann (1952);
Lampugnani (ed.) (1982);
Sky & and Stone (1976);
"Visionary architecture." A Dictionary of Architecture and Landscape Architecture. . Encyclopedia.com. (August 15, 2018). http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/visionary-architecture
"Visionary architecture." A Dictionary of Architecture and Landscape Architecture. . Retrieved August 15, 2018 from Encyclopedia.com: http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/visionary-architecture