Frederikssund is a Danish town, seat of the Frederikssund Municipality, in the Region Hovedstaden with a population of 15,865. It received the status of market town in 1810. The town is famous for its annual Viking Games as well as for the J.F. Willumsen museum. Since 1935, it has been connected to Hornsherred via the Kronprins Frederik Bridge. There is evidence of communities dating right back to the stone age with a number of burial sites in the area. It seems probable that there was a small settlement at the present location of Frederikssund in the Middle Ages but the development of the town probably began in the 12th century with the construction of a church at what was then known as Ude Sundby or Sundby Farge.