Example for a search in within germangalleries.com:
"Andy Warhol" might bring up:
http://www.germangalleries.com/Hamburger_Kunsthalle/Warhol.html
http://www.germangalleries.com/Schloss_Morsbroich/Warhol.01.html
and other current or previous exhibitions featuring "Andy Warhol".
It is possible to search for other words, too - not only names of artists.
