What was the Great Fire of London?
2 September 2016 Last updated at 07:34 BST
It's been 350 years since the Great Fire of London started.
It was a four day blaze, which swept through Britain's capital, destroying large parts of it.
To mark the anniversary, a model replica of London will be burned, and new stamps have been designed.
But what exactly happened and how did it change the city's history?
Jenny has been taking a look back.