||Originally called a longcase clock (also tall-case or floor clock), it is a tall, freestanding, weight-driven pendulum clock with the pendulum held inside the tower. The cases often feature elaborately carved ornamentation surrounding the clock face. The English clockmaker William Clement is credited with the development of this clock form in 1670.
Until the early 20th century, pendulum clocks were the world's most accurate timekeeping technology, and longcase clocks, due to their superior accuracy, served as time standards for households and businesses. Today they are kept mainly for their decorative and antique value.