Vigan is the historic city of Ilocos Sur province, which was inscribed in UNESCO's world heritage list in November 1999. Established in the 16th century, Vigan is the best preserved example of a planned Spanish colonial town in Asia. Its architecture reflects the coming together of cultural elements from elsewhere in the Philippines and from China with those from Europe to create a unique culture and townscape without parallel anywhere in East and Southeast Asia. Its Kamestizoan District is replete with ancestral houses with ancient tiled roofs, massive hardwood floorings, ballustrades and azoteas in varying Spanish-Mexican-Chinese architectural styles.