Elizabeth Tower, formerly Clock Tower, overlooks River Thames in London. Palace of Westminster caught fire in 1834, only parts survived. New clock tower completed in 1854, 315 feet high with 13-ton bell
Big Ben stands at 316 feet tall in Westminster, London. The tower features a 13.7-ton bell and 324 pieces of opalescent glass. The clock is the most accurate four-faced chiming clock in the world. The tower has 11 floors and is located near the Houses of Parliament
Founded in 1851 by Isaac M. Singer and Edward C. Clark as I.M. Singer & Co. First practical domestic sewing machine design with eye-pointed needle. Became world's largest sewing machine manufacturer by 1860. Won first prize at 1855 Paris World's Fair
Clock towers house turret clocks with clock faces on exterior walls. Structures must have at least 50% habitable floor area. Can be freestanding or part of larger buildings
Founded in 1851 by Isaac M. Singer and Edward C. Clark as I.M. Singer & Co. First practical domestic sewing machine design with eye-pointed needle. Became world's largest sewing machine manufacturer by 1860. Won first prize at 1855 Paris World's Fair
The Clock Tower is the world's largest four-faced chiming turret clock. Built in 1858 by Charles Barry and Augustus Pugin in Gothic revival style. Tower stands 96.3 metres high, with clock faces 55 metres above ground. Contains cells for Parliamentary privilege breaches