The phrase "main gallery" refers to the primary exhibition space within a museum or art gallery, where the most important or featured artworks are displayed.
18th Street's Lab Artist program invites local artists to use the center's main gallery space as an ongoing open studio for the development of a new work. (18thstreet.org)
The exhibition is on view in the Second Floor Main gallery. (momaps1.org)
He fills the large main gallery with metal hoops, packed tightly so as to sustain their form only by pressure from each other and the walls. (haberarts.com)