Of course, the Great Fire of London in 1666 is only one of numerous fires which have occurred in London (although it was no doubt the greatest in terms of destruction). But among others was a fire in 1212 which has been described as London’s worst in terms of the death toll which some have put as high as 3,000 (although it’s generally believed it’s unlikely to have been that high).
The fire, which only came some 77 years after another great conflagration destroyed a stretch of the city reaching from Westminster to St Paul’s Cathedral in 1135, began in Southwark on 10th July (hence it’s also known as the Great Fire of Southwark). Crossing London Bridge, it went on to destroy a large part of the City itself.
As well as destroying buildings on London Bridge including houses and the chapel (the structure itself, having recently been rebuilt in stone, survived somewhat intact although it only remained in partial use for some time afterward), also destroyed the Southwark church known as St Mary Overie (precursor to today’s Southwark Cathedral) as well as many buildings around Borough High Street.
There were apparently numerous deaths – the story goes that many of them occurred when a mass of people poured onto London Bridge from the City as they attempted to cross to Southwark to help put out the fire (or perhaps just gawk at it).
They were trapped in the middle of the bridge when, with the south end was already ablaze, the north end caught fire from sparks. As well as suffering fatally from the effects of flames and smoke, people were apparently crushed in panic and others were pushed off the bridge to drown in the River Thames (along with some of the boat crews who tried to rescue them).
And, just as the Great Fire of 1666, the fire of 1212 did result in some building reforms including the placement of a ban on the use of thatch for rooves.