A small Christian denomination founded by Menno Simons, a former priest, in Holland in the 1550s. They were persecuted in various countries, but found a safe place in Germantown, near Philadelphia, on land provided by William Penn. They do not believe in baptising infants, original sin, taking public oaths, fighting in wars, or taking part in secret groups. They celebrate The Lord's Supper as they call it twice a year. They also practice foot-washing. They are particulary noted for their charitable work and especially for a worldwide relief organization. Members of the denomination are called Mennonites.