The cassock, an item of clerical clothing, is a long, close-fitting, ankle-length robe worn by clerics of the Roman Catholic Church, Eastern Orthodox Church, Anglican Church, Lutheran Church and some clerics of the Reformed churches. The cassock derives historically from the tunic that was formerly worn underneath the toga in classical antiquity. The word cassock probably comes from the word "casaque" which means cloak; or cassaca, which means white. In older days, it was known in Latin as vestis talaris.