The original boat, called boat X, can be dated back to the end of the fourteenth century. The Blanche is completely faithful to the original in all her details and is built according to the medieval techniques of radial splitting and ”billing” (dressing the wood with a broad axe). The oak timbers used for the boat come from the island of Visingsö in Lake Vättern.
Blanche and her crew visit the Medieval Museum from time to time but are for the most part of the summer to be seen at Skeppsholmen, opposite of the Vasa Museum.
The boat is named after Queen Blanche (Blanka) of Namur. She lived in the fourteenth century and was married to King Magnus Eriksson.
Blanche is owned by the Medieval Museum and run by the Blache Boat Crew.