I found this part fascinating:<p>> In 1282, the administration passed to two bridge wardens, chosen from the citizens of London, who headed an organisation called Bridge House. Its rent books, accounts, and leases are the main sources for our understanding of the history of the bridge. Bridge House still exists, and its investments are today used for the support not only of London Bridge, but also Southwark Bridge, Blackfriars Bridge, Tower Bridge, and the Millennium Bridge.<p><a href="https://en.m.wikipedia.org/wiki/Bridge_House_Estates" rel="nofollow">https://en.m.wikipedia.org/wiki/Bridge_House_Estates</a><p>Apparently the organisation today has an endowment of £1.5bn! And is still responsible - 741 years later - for maintaining the Thames bridges.