Can you see it at the top of the tower? The truth is that the name of the clock is The Great Bell, but even on Big Ben's official site they gave up the official name in favor of its more popular nickname- Big Ben.
The clock was named after Sir Benjamin Hall, who was in charge of the bell’s installation in 1859. It is told that Benjamin was a large man, prodding his co-workers to call him Big Ben.
The project of raising the bell, which weighed about 12 tons of cast iron, to the top of the tower, was complex and required great effort. Due to its size, it took 30 hours to hoist it up. This was done while the giant bell was tilted parallel rather than perpendicular to the ground. When they finally managed to place the large bell at the top of the tower, they naturally called it Big Ben.
Who would have thought that the director’s name would become one of the most prominent symbols in the kingdom?!
In the past, Big Ben's slant was only a rumor, and only engineers seemed to notice. Today, if you look well, you will see it with your own eyes: the tower seems to have "bent." It is widely believed that the gradual deflection was caused by intensive construction work around the base of the tower, construction of an underground parking lot for members of the parliament and the introduction of a sewer line laid in the 1960's and underground trains. These all affected the land on which the structure stands and caused its instability.
According to the engineers' measurements, since 2003 the tower is slowly leaning over at a rate of 0.9 millimeters a year. The report also revealed that a "mysterious" incident occurred between November 2002 and August 2003, which caused the tower to tilt sideways by 3.3 millimeters. But you can remain calm at the pace of the current shift, it will take Big Ben at least 4,000 years to fall!