The city was founded by Romans in the second century A.D. It stands on a famous river. It is the world's most visited city according to the flights that arrive at its four airports. It has a great number of universities where students from all over the world can study. The official language is English. It has famous landmarks visited by millions of tourists every year, like the British Museum, Madame Tussaud's, the National Gallery, the Big Ben and so many others. Can you guess the city?
Answer: London
