Intramuros, located along the southern bank of the Pasig River, was built by the Spaniards in the 16th century and is the oldest district of the city of Manila, the capital of the Philippines. Its name, in Spanish, intramuros, literally "within the walls", meaning within the wall enclosure of the city/fortress, also describes its structure as it is surrounded by thick, high walls and moats. During the Spanish colonial period, Intramuros was considered Manila itself.

Intramuros was completed in 1606 and it served as the center of political, military and religious power of the Spaniards during the time that the Philippines was a colony of Spain. Inside Intramuros, there are several Roman Catholic churches, like the Manila Cathedral and the San Agustin Church, convents and church-run schools, such as the Universidad de Santo Tomás, the Colegio de San Juan de Letrán and the Ateneo Municipal de Manila, which were usually being run by religious orders such as the Dominicans, Augustinians, Franciscans and Jesuits. The Governor's Palace, the official residence of the Spanish Viceroyalties to the Philippines was originally in Intramuros before it was officially moved to Malacañang Palace and Fort Santiago. Only Spaniards and Mestizos were allowed to take part on political issues and take residence inside the walled city, Christian natives and Chinese were allowed to enter, but Spanish officials prevented them living inside. The vast majority of the natives and Chinese residents lived outside the walled city.

from wikipedia. =)