Bellfounding is the casting of bells in a foundry for use in churches, clocks, and public buildings. The process in East Asia dates to about 2000 BC and in Europe dates to the 4th or 5th century. In early times, when a town produced a bell it was a momentous occasion in which the whole community would participate. Archaeological excavations of churchyards in Britain have revealed furnaces, which suggests that bells were often cast on site in pits dug in the building grounds.