In architecture, a long gallery is a long, narrow room, often with a high ceiling. In Britain, long galleries were popular in Elizabethan and Jacobean houses. They were often located on the upper floor of the great houses of the time, and they stretched across the entire frontage of the building. They served several purposes: they were used for entertaining guests, for taking exercise in the form of walking when the weather was inclement, and for displaying art collections.