Association of Collegiate Schools of Architecture
Lists about 123 schools offering degrees in architecture.

Cyburbia.org
Cyburbia (formerly called PAIRC - The Planning and Architecture Internet Resource Center) contains a comprehensive directory of Internet resources relevant to planning, architecture, urbanism and other topics related to the built environment. Also contains information about architecture and planning related mailing lists and Usenet newsgroups and hosts several interactive message areas.

Great Buildings and Structures
Use this directory to find all types of buildings and structures by name, building type, historic period, location or designer.

Great Buildings Collection
This site produced by Artifice, Inc. documents hundreds of buildings and leading architects with 3D models, photographic images and architectural drawings, plus commentaries, bibliographies and web links for famous designers and structures.