Both the original Liberty Bell (the current one has been recast on multiple occasions) and Big Ben were cast at the same foundry (which is still in operation - the oldest still operating manufacturer in the UK), located in and named for this district of London. This district is located in the "East End" of London within the borough of Tower Hamlets. While once one of the worst crime districts in London, the political response to a series of murders between 1888 and 1891 helped to clean up the area. Identify this district that is home to this famous bell foundry.
Whitechapel