Proporta has teamed up with the National Gallery in London to create a new line of iPhone and iPad cases featuring artwork depicting classic London scenes. Two snap-style cases for the iPhone 4 and iPhone 4S are available, featuring a postcard print of Trafalgar Square and Monet’s “The Thames below Westminster”, respectively; both cases offer full access to all ports, controls, and cameras, and sell for $20 each. Also available are leather style folio cases for the third-generation iPad and iPhone 4/4S, featuring black exteriors and the aforementioned Trafalgar Square postcard print on the inside. They also offer full access to all ports, controls and cameras, and sell for $68 and $34, respectively. The full National Gallery line is available now.