For sure Gagosian Gallery is the greatest gallery woldwide and perhaps the most influential.
The network of Larry Gagosian includes galleries in New York (Madison Avenue, West 24th Street, West 21st Str ), Beverly Hills, London (Britannia Str, Davis Str), Rom, Athen and offices in La Jolla and Hong Kong
USA/New York: Gagosian Gallery Madison Avenue - Gagosian Gallery West 24th Street - Gagosian Gallery West 21st Street
Contact InformationGagosian Gallery West 21st Street
522 West 21st Street
NY 10011 New York (USA)