The boundaries of the City of London ceased to coincide with the old city wall as the city expanded its jurisdiction during the medieval period. The city's jurisdiction expanded westwards, crossing the historic western border of the original settlement – the River Fleet – along Fleet Street to Temple Bar. The city also took in the other "city bars", toll gates which were situated just beyond the old walled area: Holborn Bar, West Smithfield Bar, and Whitechapel Bar. These were the important entrances to the city and their control was vital in maintaining the city's special privileges over certain trades.