Atlasgeo.net: Czech Republic - Animated GIF image.
Czech Info Center: History of National Symbols - Details on the creation of the flag and coat of arms.
Flags of the World: Czech Republic - National, district, municipality, and political flags, as well as historical Czechoslovakian flags.
The Flag of the Czech Republic - History and symbolism.
Theodora.com: Flag of Czech Republic - Images in several sizes.
World Flag Database: The Czech Republic - National flag and country details.