Medieval Art and Architecture: Windows & Doors

Had to post this twice:

Comparative Examples of Gothic Tracery Development. English Gothic Examples. XVII

Victorianweb.org and Landow.com

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Glossary of Medieval Art and Architecture:tympanum

Glossary of Medieval Art and Architecture

tympanum : (plural, tympana): The basically semicircular area enclosed by the arch above the lintel of an arched entranceway. This area is often decorated with sculpture in the Romanesque and Gothic periods.

See also: lintel, portal.

www.pitt.edu/~medart/menuglossary/tympanum.htm‎

tympanum : (plural, tympana): The basically semicircular area enclosed by the arch above the lintel of an arched entranceway. This area is often decorated with ...

...

More images found on an excellent blog: architectonice

"This is a blog specifically for Gothic and Neo-Gothic architecture." 

Many fine examples: http://www.tumblr.com/tagged/gothic-architecture 

Heavy studded door and arched leaded windows (below)