The Colosseum or  Coliseum, also known as the Flavian Amphitheatre is an elliptical  amphitheatre in the centre of the city of Rome, Italy. Built of concrete  and stone, it was the largest amphitheatre of the Roman Empire, and is  considered one of the greatest works of Roman architecture and  engineering. It is the largest amphitheatre in the world. The Colosseum  is situated just east of the Roman Forum. Construction began under the  emperor Vespasian in 70 AD, and was completed in 80 AD under his  successor and heir Titus. Further modifications were made during the  reign of Domitian (81–96). These three emperors are known as the Flavian  dynasty, and the amphitheatre was named in Latin for its association  with their family name.

The Colosseum could  hold, it is estimated, between 50,000 and 80,000 spectators, and was  used for gladiatorial contests and public spectacles such as mock sea  battles, animal hunts, executions, re-enactments of famous battles, and  dramas based on Classical mythology. The building ceased to be used for  entertainment in the early medieval era. It was later reused for such  purposes as housing, workshops, quarters for a religious order, a  fortress, a quarry, and a Christian shrine. Although in the 21st century  it stays partially ruined because of damage caused by devastating  earthquakes and stone-robbers, the Colosseum is an iconic symbol of  Imperial Rome. It is one of Rome's most popular tourist attractions and  has close connections with the Roman Catholic Church, as each Good  Friday the Pope leads a torchlit "Way of the Cross" procession that  starts in the area around the Colosseum. The Colosseum, like all the  Historic Centre of Rome, Properties of the Holy See in Italy and the  Basilica of Saint Paul Outside the Walls, was listed as a World Heritage  Site by UNESCO in 1980. In 2007 the complex was also included among the  New7Wonders of the World, following a competition organized by New Open  World Corporation (NOWC).-

The Colosseum was  used to host gladiatorial shows as well as a variety of other events.  The shows, called munera, were always given by private individuals  rather than the state. They had a strong religious element but were also  demonstrations of power and family prestige, and were immensely popular  with the population. Another popular type of show was the animal hunt,  or venatio. This utilized a great variety of wild beasts, mainly  imported from Africa and the Middle East, and included creatures such as  rhinoceros, hippopotamuses, elephants, giraffes, aurochs, wisents,  Barbary lions, panthers, leopards, bears, Caspian tigers, crocodiles and  ostriches. Battles and hunts were often staged amid elaborate sets with  movable trees and buildings. Such events were occasionally on a huge  scale; Trajan is said to have celebrated his victories in Dacia in 107  with contests involving 11,000 animals and 10,000 gladiators over the  course of 123 days. 

During the early days  of the Colosseum, ancient writers recorded that the building was used  for naumachiae (more properly known as navalia proelia) or simulated sea  battles. Accounts of the inaugural games held by Titus in AD 80  describe it being filled with water for a display of specially trained  swimming horses and bulls. There is also an account of a re-enactment of  a famous sea battle between the Corcyrean (Corfiot) Greeks and the  Corinthians. This has been the subject of some debate among historians;  although providing the water would not have been a problem, it is  unclear how the arena could have been waterproofed, nor would there have  been enough space in the arena for the warships to move around. It has  been suggested that the reports either have the location wrong, or that  the Colosseum originally featured a wide floodable channel down its  central axis (which would later have been replaced by the hypogeum). - 

Sylvae or recreations  of natural scenes were also held in the arena. Painters, technicians  and architects would construct a simulation of a forest with real trees  and bushes planted in the arena's floor, and animals would then be  introduced. Such scenes might be used simply to display a natural  environment for the urban population, or could otherwise be used as the  backdrop for hunts or dramas depicting episodes from mythology. They  were also occasionally used for executions in which the hero of the  story played by a condemned person was killed in one of various gruesome  but mythologically authentic ways, such as being mauled by beasts or  burned to death. -

