London was founded approximately 2000 years ago by the Romans. It was called Londinium. It’s one of the biggest cities in Europe with approximately 8,200,000 people living in the city, which is about 607 sq miles. The 5 most important ethnic groups composing the population of London are British, Indians, Polish, Irish, and Nigerians. London is crossed by the River THAMES and contains many important and famous monuments, including 4 World Heritage Sites: The Tower of London, Westminster Abbey, Kew Gardens, and Greenwich.