A mausoleum is a last resting place above the ground that offers an alternative to traditional subterranean burial. A mausoleum is an above-ground burial area that contains one or more crypts, or burial niches, for both whole body burial and cremated ashes. The first mausoleum was built in 1872 in Mausanne-les-Bains, Switzerland by Emmanuel Louis Masselin. It was designed by Pierre-Charles L'Enfant. As with other forms of outdoor burial, the deceased are interred in a mausoleum under their own name. There they remain until someone visits the site who knows how to locate them. When visitors enter the site through a small entrance hall, a guardian angel usually stands watch over the tombstone(s) of the deceased. The practice of mausoleum burial was very popular in France and America in the late 19th and early 20th centuries. Today it is practiced mainly in these and other European countries, as well as in Israel, India, and Pakistan. In the United States, approximately 30,000 mausoleums are believed to be in use today. They can be found everywhere from large cemeteries like Mount Auburn in Cambridge, Massachusetts, to small family plots in residential neighborhoods. Mausoleums were also used as temporary burial sites during times of disaster or war when normal burial procedures were disrupted.