Vigan is one of the most preserved Spanish colonial towns in the Philippines. With numerous historical buildings and houses, UNESCO registered Vigan as the World Heritage in December 1999. As an entrepot flourished by Chinese mestizo residents, Vigan forms an amalgam of native, Chinese and Spanish cultural landscape. The public spaces such as the poblacion (city center) strongly reflects Leyes de Indias (Laws of Indies): plaza surrounded by cathedral, convent, city hall, and relatively grid street pattern. Yet, deviation from the Spanish colonial city planning concept is visible, in comprising two main plazas, and in the indistinct racial residential separation. The paper is composed of : administration history of Vigan and the Philippines ;reference to the Leves de Indias colonial law and other Hispanized towns ; and considerations on block formation, road width, and lot division in Vigan. In conclusion, this paper proposes 3×3 block subdivision style and the modified use of Spanish module svstem in Vigan.
