 Less often, though nonetheless notable, altars are set in spaces occupied less regularly, such as outdoors in nature, in cemeteries, in mausoleums/crypts, and family dwellings.Personal altars are those placed in a private bedroom, closet, or other space usually occupied by one person.They are used for practices of piety intended for one person (often referred to as a private devotion).They are also found in a minority of Protestant worship place; in Reformed and Anabaptist churches, a table, often called a "Communion table", serves an analogous function.