Endowments for charitable purposes, including schools, have existed for centuries, usually in former times associated with religion, as in the Christian and Islamic worlds, in Jewish communities, and doubtless elsewhere. Most often under older conditions they consisted in the right to receive income from land, or from land and buildings, under whatever provisions for tenure and ownership might prevail from one place to another. They have generally been “perpetual,” that is, intended to pass unchanged from one generation to the next. Much has been written on the origins of such endowments or foundations. Less attention has been given to how they may end.