In addition to the expected brief essays on television shows and hollywood personalities, there are also entries for the Chrysler Building (New York) and Dunkin' Donuts.
A good source of background information, the online version of the complete Encyclopedia Britannica includes brief essays on cultural movements and notable personalities.
The Biography Resource Center combines over "400,000 biographies from more than 130 respected Gale sources..." Contributing sources include: Contemporary Authors, Encyclopedia of World Biography, Newsmakers, Contemporary Theatre, Film, and Television, Contemporary Musicians, Contemporary Black Biography, and the International Dictionary of Art and Artists.