Malolos is hailed as the Premiere Heritage City of Bulacan. Many ancestral houses from the Spanish and American periods, Spanish colonial churches and chapels, historical sites and landmarks, and even structures such as walls and bridges with heritage and historical value are found around the city. Some of these were already marked by National Historical Institute while others are marked by the City Government. The historic town center of Malolos was declared National Heritage Landmark on August 15, 2001 under the name of Malolos Heritage Town.