The Placa has for centuries been the centre of Omišalj. At the beginning of the 20th century, this function was gradually taken over by the area at the southern edge of the town, the site of the former castle, where the new municipal building was constructed before World War One. The houses that line the Placa possess traces of original medieval and Renaissance architecture, which are hidden beneath the building works, adaptations and renovations that occurred in the course of later centuries, especially during the 19th and early 20th century, when Omišalj was significantly reshaped.