The premises that will be open to the public on the occasion of ‘Monumento Habrí’ (Open Monument Day), for the greater part are situated on the isthmus that in those days connected Willemstad with the rest of the island. Here ‘Pietermaai Smal’ (Narrow Pietermaai) originated in the 18th and 19th century. The area in which the houses are opened rund from the Theaterstraat up to and including the Johan van Walbeeckplein.