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Great Buildings and Architects Online
GreatBuildings.com, the premiere online architecture collection, documenting great buildings and designers from around the world and across history, with images, commentary, and hundreds of free 3D walkthrough models.
- Great Architects
Architectural Types and Styles
Architecture and Places of the World
World Architecture Picture Index
RIBA Library Catalog
The world's largest architecture library catalog is maintained by R.I.B.A., accurately indexing most of the world's leading print periodicals on architecture. It's an amazing resource, fully searchable online, both directly, and through GreatBuildings.com.
RIBA Architecture Library Catalog