Holbæk is first mentioned in official documents in Absalon's letter of June 8, 1199, in which he granted the majority of his estates to Sorø Klosterkirke in Sorø. It was called Holbækgaard, a larger farm belonging to a nobleman, around which the city would eventually develop.
Holbæk clearly grew from then on but is not mentioned again until around 1400 when Margaret I came for a court proceeding that granted her territories in Jutland. The event may have triggered the creation of the first city seal which shows the three trees by the water that are the prominent features of the current seal.
Dorchester, Dorset, United Kingdom. resulted from a shared interest in community plays. Groups of actors from the two towns each took part in the other's community play in the early 1990s and this resulted in the formal twinning in 1992.