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    London, the capital city England, has been one of the major cities in Europe for centuries. Because of its long history. It has many old buildings. Known as the city, which cover only about 2.6 sq km (about 1 sq m) the city is capitalized, distinguished it for the larger metropolis. This is where London began as a Roman Folonial town around AD 50, at the point where the Romans built the first bridge in London. Today this area is one of the world's leading financial centers. Most of the financial activities are crowded along the thread needle street, near the intersection known as the change, and the stock exchange. The permanent residential of the city is now less than 6000, but about 350.000 commute here daily to work. The only large residential portion of the city Barbican Center, a concrete complex of towers parking garage, and pedestrian Walkways located on the northem edge of the city. The Barbican was built to replace older buildings destroyed in the World War II (11939-1945), when the Germans heavily bombed London.

"... and pedestrian walkways located on the northern edge of the city".

The underlined word means ____