The City of Portland has a rich collection of architecture and landscapes that date back to the eighteenth century. The quality, craftsmanship, and beauty of these properties are an important part of the Citys special character and heritage. In 1990, the City of Portland established a historic preservation ordinance to help protect this legacy. Today, over 1,500 properties are protected as individual landmarks or as part of one of several historic districts. The Citys Historic Preservation Committee, in conjunction with Planning Department staff, is responsible for identifying and protecting historic properties in Portland. In addition, the Committee reviews projects within the local historic districts and at individually designated landmarks to ensure compliance with the historic preservation ordinance.