A&E Television
History.com: Why Did the Beatles Break Up?
The four Beatles; John Lennon, Paul McCartney, George Harrison and Ringo Starr; changed music forever in a relatively brief time span, bursting onto the scene in 1963 with "Please Please Me" and recording their last albums, "Let It Be"...
The Wharton Group
Discover France: The Art of Sculpture in France
This entry on the history of sculpture in France has a short section that describes 20th century sculpture.