The Great Fire of London destroyed much of what was inside the old Roman walls of the city.
13,000 homes were destroyed along with nearly 90 churches, and St Paul's Cathedral.
But from out of the ashes of this disaster came some of the capital's most important architecture - namely the churches designed by Sir Christopher Wren and his assistant Robert Hooke. There were originally 51, now just 27 remain.
These classic buildings in the middle of a rapidly changing City, are the focus of the book After the Fire, by Angelo Hornak. He shared some of his fascinating insights with London Live.