It is the purpose of this chapter to provide for the identification, designation and regulation, for purposes of protection, preservation and continued use and enhancement, of those sites, structures with their appurtenances and environmental settings, and districts of historical, archeological, architectural or cultural value in that portion of the county which is within the Maryland-Washington Regional District. Its further purpose is to preserve and enhance the quality of life in the county, safeguard the historical and cultural heritage of the county, strengthen the local economy, stabilize and improve property values in and around such historical areas, foster civic beauty and to preserve continued utilization and pleasure of the citizens of the county, the state, and the United States of America. (Ord. No. 9-4, § 1; Ord. No. 11-59.)