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Works on paper, such as drawings, pastels, watercolors, prints, and photographs are typically not permanently displayed for conservation reasons.

Instead, public access to these materials is provided by a dedicated print study room located within the museum.

Murals generally remain where they have been painted, although many have been removed to galleries.

Various forms of 20th century art, such as land art and performance art, also usually exist outside a gallery.

Photographic records of these kinds of art are often shown in galleries, however.

Most museum and large art galleries own more works than they have room to display.

The rest are held in reserve collections, on or off-site.