At the medieval times the Vantaankoski area became an important junction of traffic. The Vantaankoski River which offered a water route from north to south, and crossed the Kings's Road, the most important main road at the time. The King's Road, reaching from the city of Turku at the west coast of Finland to the city of Vyborg at the east coast, was an active and popular route for kings, bishops, pilgrims and especially traders to travel. The Vantaankoski area became an important hub of commerce, and therefore guesthouses and inns were needed as resting points for the travellers.
The Old File Factory was founded in 1890 when Swedish W.W.Wahlberg bought the premises of an iron factory at Vantaankoski and established a file factory at the very same location. Wahlberg also founded a new mill at the Vantaankoski area, as well as an electricity plant which made the Myllykylä village one of the first areas in Helsinki region to have electric lights. Right next to the file factory Wahlberg built a factory producing cotton waste, but unfortunately a fire destroyed the building later on.
The file factory how ever, produced hand made files up until 1960's. After W.W. Wahlberg died, the factory was shut down and the heirs sold the buildings to the city of Vantaa. The city had no use for empty factory buildings and gave an order to tear down the old factory. Fortunately the active locals stood up pleading for restoration of the old factory milieu. Determination and devotion led to a positive result and eventually the old factory building was permanently preserved by the city of Vantaa and the renovation of the premises was to begin.
Today the Restaurant Kuninkaan Lohet (King's Salmon) continues the glorious traditions of the guest houses in the premises of the old file factory, providing a scenic milieu for festivities, business meetings and conferences.