weeds. In at least one case in the United States, the headstones from a churchyard in Pittsburgh were used to help form the foundation for an addition to the church fifty years after the last burial in the churchyard took place (the foundation itself unknowingly went through fifteen graves), with the churchyard itself becoming a parking lot nearly forty years after that; the churchyard was largely forgotten until PennDOT purchased the church property via eminent domain for construction of Interstate 279 and subsequently unearthed 727 graves. Some churchyards across the world are still used as graveyards today, particularly in most hamlets and small towns. Public cemeteries are primarily seen in major towns and cities. Ecology Churchyards can be host to unique and ancient habitats because they may remain significantly unchanged for hundreds of years. See also Cemetery Church grim Corpse road Headstone Lychgate Parish close Pogost Bibliography References External links Cemeteries Christianity and death