St. Basil's Cathedral, blogged to Slice from the Flickr photostream of mashu mashu

Not only giant, but with local landmarks depicted upon it:

MOSCOW, September 6 (RIA Novosti) - Sightseers in Moscow might be able to take a very different look at local landmarks Thursday when they appear on an enormous pizza baked in honor of the capital's birthday....

The edible "map" will feature famous sights, including the Kremlin, Vorobyovy Gory hills with a platform overlooking the capital and a ski jump, the Moskva River, and new sprawling communities outside the Ring Road around the city.

RIA Novosti - Russia - Kremlin, communities to feature on giant Moscow birthday pizza