Regional variations include the use of thicker, and denser roof thatching in mountain areas, or longer stilts on coastal areas particularly if the structure is built over water. The architecture of other indigenous tribes may be characterized by an angular wooden roofs, bamboo in place of leafy thatching and ornate wooden carvings.
The Spaniards introduced stones as housing and building materials. The introduction of Christianity brought European churches, and architecture which subsequently became the center of most towns and cities. Spanish architecture can be found in Intramuros, Vigan, Iloilo, Jaro and other parts of the Philippines. Islamic and other Asian architecture can also be seen depicted on buildings such as mosques and temples.