Duque Ancestral HouseDuque Ancestral House is a Local Cultural Property - Cultural and Historical Heritage of the Province of Ilocos Norte (per Provincial Ordinance Nos. 049-2006 and 039-2009); Registered Property, Municipality of Paoay; Registered Property, Province of Ilocos Norte located at Paoay, Ilocos Norte, Region I.
A unique American period house of Constancio Diaz Duque, it is made up of two floor, using vertical wooden planks construction method on top of a one-meter ground elevation. The house features several design elements including the star of David on its facade, capiz window panes, and stylized eaves. It has high ceilings on both floors, and the compound has a well constructed on the same period or possibly earlier. It is popularly known as the octagon house, though it is not really octagonal.