A tower is a tall structure, taller than it is wide, often by a significant factor. Towers are distinguished from masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures.

Towers are specifically distinguished from buildings in that they are built not to be habitable but to serve other functions using the height of the tower. For example, the height of a clock tower improves the visibility of the clock, and the height of a tower in a fortified building such as a castle increases the visibility of the surroundings for defensive purposes. Towers may also be built for observation, leisure, or telecommunication purposes. A tower can stand alone or be supported by adjacent buildings, or it may be a feature on top of a larger structure or building.


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Towers have been used by humankind since prehistoric times. The oldest known may be the circular stone tower in walls of Neolithic Jericho (8000 BC). Some of the earliest towers were ziggurats, which existed in Sumerian architecture since the 4th millennium BC. The most famous ziggurats include the Sumerian Ziggurat of Ur, built in the 3rd millennium BC, and the Etemenanki, one of the most famous examples of Babylonian architecture.

Some of the earliest surviving examples are the broch structures in northern Scotland, which are conical tower houses. These and other examples from Phoenician and Roman cultures emphasised the use of a tower in fortification and sentinel roles. For example, the name of the Moroccan city of Mogador, founded in the first millennium BC, is derived from the Phoenician word for watchtower ('migdol'). The Romans utilised octagonal towers[1] as elements of Diocletian's Palace in Croatia, which monument dates to approximately 300 AD, while the Servian Walls (4th century BC) and the Aurelian Walls (3rd century AD) featured square ones. The Chinese used towers as integrated elements of the Great Wall of China in 210 BC during the Qin Dynasty. Towers were also an important element of castles.

Other well known towers include the Leaning Tower of Pisa in Pisa, Italy built from 1173 until 1372, the Two Towers in Bologna, Italy built from 1109 until 1119 and the Towers of Pavia (25 survive), built between 11th and 13th century. The Himalayan Towers are stone towers located chiefly in Tibet built approximately 14th to 15th century.[2]

Up to a certain height, a tower can be made with the supporting structure with parallel sides. However, above a certain height, the compressive load of the material is exceeded, and the tower will fail. This can be avoided if the tower's support structure tapers up the building.

A third limit is dynamic; a tower is subject to varying winds, vortex shedding, seismic disturbances etc. These are often dealt with through a combination of simple strength and stiffness, as well as in some cases tuned mass dampers to damp out movements. Varying or tapering the outer aspect of the tower with height avoids vibrations due to vortex shedding occurring along the entire building simultaneously.

Although not correctly defined as towers, many modern high-rise buildings (in particular skyscraper) have 'tower' in their name or are colloquially called 'towers'. Skyscrapers are more properly classified as 'buildings'. In the United Kingdom, tall domestic buildings are referred to as tower blocks. In the United States, the original World Trade Center had the nickname the Twin Towers, a name shared with the Petronas Twin Towers in Kuala Lumpur. In addition some of the structures listed below do not follow the strict criteria used at List of tallest towers.

The tower throughout history has provided its users with an advantage in surveying defensive positions and obtaining a better view of the surrounding areas, including battlefields. They were constructed on defensive walls, or rolled near a target (see siege tower). Today, strategic-use towers are still used at prisons, military camps, and defensive perimeters.

By using gravity to move objects or substances downward, a tower can be used to store items or liquids like a storage silo or a water tower, or aim an object into the earth such as a drilling tower. Ski-jump ramps use the same idea, and in the absence of a natural mountain slope or hill, can be human-made.

In history, simple towers like lighthouses, bell towers, clock towers, signal towers and minarets were used to communicate information over greater distances. In more recent years, radio masts and cell phone towers facilitate communication by expanding the range of the transmitter. The CN Tower in Toronto, Ontario, Canada was built as a communications tower, with the capability to act as both a transmitter and repeater.

Towers can also be used to support bridges, and can reach heights that rival some of the tallest buildings above-water. Their use is most prevalent in suspension bridges and cable-stayed bridges. The use of the pylon, a simple tower structure, has also helped to build railroad bridges, mass-transit systems, and harbors.

Blackpool Tower is a tourist attraction in Blackpool, Lancashire, England, which was opened to the public on 14 May 1894. When it opened, Blackpool Tower was the tallest man made structure in the British Empire.[1] Inspired by the Eiffel Tower in Paris, it is 518 feet (158 metres) tall and is the 125th-tallest freestanding tower in the world.[2] Blackpool Tower is also the common name for the Tower Buildings, an entertainment complex in a red-brick three-storey block that comprises the tower, Tower Circus, the Tower Ballroom, and roof gardens, which was designated a Grade I listed building in 1973.[3]

Two Lancashire architects, James Maxwell and Charles Tuke, designed the tower and oversaw the laying of its foundation stone[5] on 29 September 1891.[6] By the time the Tower finally opened on 14 May 1894, both men had died.[5] Heenan & Froude, then of Manchester, were appointed structural engineers, supplying and constructing both the tower, the electric lighting and the steel front pieces for the aquariums. A new system of hydraulic riveting was used, based on the technology of Fielding & Platt of Gloucester.[7]

The total cost for the design and construction of the tower and buildings was about 290,000.[8] Five million Accrington bricks, 3,478 long tons (3,534 t) of steel and 352 long tons (358 t) of cast iron were used to construct the tower and base.[8][9] Unlike the Eiffel Tower, Blackpool Tower is not freestanding. Its base is hidden by the building that houses Blackpool Tower Circus. The building occupies a total of 6,040 square yards (1.25 acres; 5,050 m2).[3] At the summit of the tower there is a flagpole[10][11] where the height at the top measures 518 feet 9 inches (158.12 m) from the ground.[9] A time capsule was buried under the foundation stone on 25 September 1891.[8]

When the Tower opened, 3,000 customers took the first rides to the top.[5] Tourists paid sixpence for admission, sixpence more for a ride in the lifts to the top, and a further sixpence for the circus.[8] The first members of the public to ascend the tower had been local journalists in September 1893, using constructors' ladders.[12] The top of the Tower caught fire in 1897, and the platform was seen on fire from up to 50 miles (80 km) away.[6]

The top of the tower was painted silver in 1977 as part of Queen Elizabeth's Silver Jubilee celebrations.[3] A giant model of King Kong was placed on the side of the tower in 1984.[3] In 1985, escapologist Karl Bartoni and his bride were married suspended in a cage from the tower.[12]

The lifts and winding gear were again replaced in 1992.[3] The same year, the tower complex was renamed Tower World, and was opened by Diana, Princess of Wales.[15] The tower is usually painted in dark red, except for its centenary year in 1994 when it was painted gold by abseiling painters.[3][10] In 1998, a "Walk of Faith" glass floor panel was opened at the top of the tower. Made up of two sheets of laminated glass, it weighs half a tonne and is two inches thick.[12] In October 2007, a laser beam installed on the Tower for the duration of the annual Illuminations was criticised by astronomer Sir Patrick Moore, presenter of television programme The Sky at Night, who said: "Light pollution is a huge problem. I am not saying we should turn all the lights out, that is not practical, but there are some things which are very unnecessary. The Blackpool Tower light is certainly something I do not think we should be doing. I very much oppose it." The beam could be seen 30 miles (48 km) away; Moore called for it to be stopped. The centre for Astrophysics at the University of Central Lancashire in Preston said the laser has added to a spiralling problem affecting astronomy.[16]

The tower continued to be owned by the Bickerstaffe family until 1964, when the Blackpool Tower Company was sold to EMI.[17] Since then it has been owned by Trust House Forte, First Leisure Corporation, and Leisure Parcs Ltd, owned by Trevor Hemmings.[18] In March 2010, it was announced that Blackpool Council had bought Blackpool Tower, and that the Merlin Entertainment Group would manage it and add various attractions, including a new Dungeon attraction, and a new observation deck called Blackpool Tower Eye would operate at the top of the tower.[19] The company was also to manage the Blackpool Louis Tussauds waxwork museum, to be rebranded as Madame Tussauds.[20]

On 28 December 2023, at around 14:15 GMT, flames were reported close to the top of the tower. Lancashire Fire & Rescue responded with six fire engines, a drone team and rope rescue. In addition to this, LFRS were also supported by a helicopter from the National Police Air Service. Later that day, at around 16:30 GMT, it was revealed that the 'flames' were in fact orange netting that was blowing in the wind.[23]

The top of the tower is currently known as the Blackpool Tower Eye. At a height of 380 feet (120 m), the Eye is the highest observation deck in North West England. It was previously known simply as the Tower Top, until it reopened in September 2011. Reopening after a major renovation, new owner Blackpool Council brought in Merlin Entertainments to manage the attractions, with Merlin deciding to incorporate the tower into its range of "Eye" branded attractions.[24] 2351a5e196

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