Many years ago I was an Architecture major. Then , in my youthful megalomania, I switched to Urban Planning. I finally realized that Urban Planning was an oxymoron and left that and went on to other things. But I never lost my love of Architecture. This U.K. site has many wonderful architectural, and related, links. Actually, I never lost my interest in Urban Planning. I hear that it does exist in some places.

Glossary of Medieval Art and Architecture

Have you never been able to tell the difference between an architrave and a pendentive? Wonderful illustrations to these medieval architectural terms. This was a link from aecportico.

both thanks to wood s lot