Neo-Classical

A White House History - The official site gives a virtual tour via a sensitive cut-away drawing. Photographs and history room-by-room of the home of U.S. presidents, designed by Irish-born James Hoban.
http://www.whitehouse.gov/history/whtour/

Edinburgh New Town - Article by Jane Boyd-Brent for About Scotland on the burst of Neo-Classical architecture in Edinburgh in the 18th century and its architects, including Robert Adam. Photographs and map.
http://www.aboutscotland.com/edin/jane.html

St George's Hall, Liverpool - Photographs and history from the BBC of this splendid Neo-Classical building, erected between 1842 and 1855 to the designs of Harvey Elmes and now a conference venue.
http://www.bbc.co.uk/liverpool/culture/2002/08/st_georges/map.shtml

Wikipedia: Neoclassical Architecture - An illustrated history and description of the revival of classical styles in architecture from the 18th century onwards.
http://en.wikipedia.org/wiki/Neoclassical_architecture

The Classical Style in Norfolk Small Towns, 1720-1800 - An illustrated description from the University of Leicester, with bibliography, including a discussion of the dissemination of Classicism to the English provinces.
http://www.le.ac.uk/urbanhist/resources/smalltowns/appendices.html

Neoclassical Architecture c. 1780-1850 - Descriptive information from the Digital Archive and American Architecture.
http://www.bc.edu/bc_org/avp/cas/fnart/fa267/neoclassic.html

Osgoode Hall - An illustrated history of this grand Classical building in Toronto, designed in 1860 and the focus for legal activity in Ontario. The Great Library is touted as the most beautiful room in Canada.
http://www.osgoodehall.com/

The Portico Pages - Examples of porch architecture in Neo-Classical and Federal styles. Includes Italian Renaissance buildings by Palladio and examples from the American South, Washington and Arlington.
http://www.porticopages.com/

Georgian Colonial Houses - About.com provides an illustrated introduction to the simplified Neo-Classical style favored by the well-to-do in 18th-century America.
http://architecture.about.com/arts/architecture/library/weekly/aa052699.htm

Wikipedia: Palladian Architecture - An illustrated history and description from the online collaborative encyclopedia of the style derived from the designs of the Italian architect Andrea Palladio (1508–1580).
http://en.wikipedia.org/wiki/Palladian_architecture

Christ Church Cathedral, Waterford - The only neo-classical Georgian cathedral in Ireland, designed by John Roberts (1714-1796). The official site includes a history and images, and a brief biography of its architect.
http://www.christchurchwaterford.com/