This is the 'Zwolse Balletjeshuis' at the Grote Kerkplein in the city of Zwolle. Since 1845 the Van Der Kolk family is making their famous round sweets here called Zwolse Balletjes. They are regarded as a traditional Dutch delicacy, and made according a (of course!) very secret recipe.
Inside there is lots to choose from all kinds of sweets!