It consists of two fires in total, the first of which occurred on 20 July 1705, and the second on 28 August of the same year.
A total of 144 houses and 121 granaries from the third and fourth districts of the city burned down in the fires.
The fire started in Knuutti Juhonpoika's kitchen, where the maid Valpuri Pietarintytär was preparing liquor mash.
Aided by the strong wind, the fire spread quickly in the then IV district, and practically the entire district burned to the ground.
It was decided to leave free space between Hahtiperä's waterfront sheds and the town's houses.