A proprietary chapel is a chapel that originally belonged to a private person, but with the intention that it would be open to the public, rather than restricted to members of a family or household, or members of an institution. Generally, however, some of the seating—sometimes a substantial proportion—would be reserved for subscribers.
St John's Downshire Hill, Hampstead
A chapel is a Christian place of prayer and worship that is usually relatively small. The term has several meanings. First, smaller spaces inside a church that have their own altar are often called chapels; the Lady chapel is a common type of these. Second, a chapel is a place of worship, sometimes interfaith, that is part of a building, complex, or vessel with some other main purpose, such as a school, college, hospital, palace or large aristocratic house, castle, barracks, prison, funeral home, cemetery, airport, or a military or commercial ship. Third, chapels are small places of worship, built as satellite sites by a church or monastery, for example in remote areas; these are often called a chapel of ease. A feature of all these types is that often no clergy were permanently resident or specifically attached to the chapel.
Chapel of St Michael and St George at St Paul's Cathedral in London
The Tsrviz Chapel in Armenia, one of the oldest chapels in the world
The Cappella Palatina in Palermo, Italy (pictured), and the Palatine Chapel in Aachen, two of the most famous palace chapels of Europe
Dahlgren Chapel of the Sacred Heart, a Catholic chapel on the campus of Georgetown University in Washington, D.C.