Cinemas in Paris
The title says it all.
http://www.artrepublic.com/wow/travel/paris/cinemas.asp

Discover France!
Offers an overview of the opera, ballet and contemporary dance scene in the "City of Light".
http://www.discoverfrance.net/France/Paris/Paris_opera.shtml

Great Buildings.com
Provides an overview of the Opera Garnier, Paris' main opera house.
http://www.greatbuildings.com/buildings/Paris_Opera.html

Olympia Bruno Coquatrix
The website of one of the city's most important music venues.
http://www.olympiahall.com/

Opera National de Paris
Homepage of the city's main opera company.
http://www.opera-de-paris.fr/

Paris.org
Lists important cabarets, theatres and opera houses in Paris.
http://www.paris.org/AfterHours/

ParisBy.com
A comprehensive list of theatres, cabarets and cinemas in Paris.
http://www.parisby.com/events/events6.htm