While brick and stone houses did exist, many houses were made of wood and leaned over into the narrow streets.
Most people lived in the same buildings as their businesses so homes often included shops, workshops, industrial premises and stores.
Did you know? There were 109 churches in the City of London before the fire.
The first church, St Margaret Fish Street Hill, caught fire overnight. 87 churches were to be destroyed by the fire.
Fishmongers’ Hall, next to London Bridge, became the first livery company hall to burn.
Cheapside, one of the City of London’s most important streets, began to burn.
Newgate prison was badly damaged. Ludgate debtors’ prison was surrounded by flames.
King Charles II said the City should be redesigned to prevent another fire - but he wanted regulations in place first.
The City authorities laid down several rules for rebuilding. New houses had to be faced with brick or stone.