Big Ben is the nickname for the great bell of 13.5 tons installed in the Clock Tower (Clock Tower) of the Palace of Westminster, the seat of the British Parliament (Houses of Parliament) in London. Only UK residents can visit Big Ben, after obtaining a autorisation3. The building faces the River Thames between Westminster Bridge and Westminster Abbey (Westminster Abbey). A fire devastated a part of the Parliament building in 1835. Following this event, a commission was set up to choose the new style of the building. The winning plan is that of Charles Barry, which provides among other things, include a bell tower to the building. The first bell is made in 1856.