Which is the first art gallery?

1. A place which exhibits items of art (an art museum), and 2. A place which sells art items. The oldest art museum is supposed to be housed in the Cosquer Caves, the under-water caves, near Marseilles. The caves consist of finger tracings, impressions of painted hands, and painted and engraved figures of animals. The oldest works in these caves were estimated to have been created 29,000 years ago. Art galleries that exhibit and sell works of art on a large scale have been in existence since the 17th century AD. Most of the oldest art auction houses that exist today in Europe have been founded in the first half of the 18th century. Vienna-based auction house Dorothium, which claims to be the oldest art auction house of the world, was founded in 1707, and Sothebys, the oldest and largest art auction house of England, was founded in 1744.