Commonly known as a 'Grandfather Clock'

A tall, floor-standing pendulum clock. Also known as a Grandfather Clock. More information: Longcase Clocks

A longcase clock, also tall-case clock, grandfather clock or floor clock, is a freestanding, weight-driven, pendulum clock with the pendulum held inside the tower, or waist of the case. Clocks of this style are commonly around 1.8-2.4m (6-8 feet) tall. The case often features elaborately carved ornamentation on the hood, or bonnet, which surrounds and frames the dial, or clock face.