Bossu-houses in Hoorn with fantastic pictures on these houses at the Slapershaven in Hoorn. The Bossu Houses are three adjoining houses. The gable stones of these 17th century houses are like a comic strip: they tell of the battle on the Zuiderzee that the West Frisians fought against the Spanish fleet of Admiral Bossu in 1573. Want to know more? Send me a message and book a city walk, even in winter it is nice to walk through the picturesque Hoorn.