High Quality Content by WIKIPEDIA articles! Dallas Landmark is a designation by the City of Dallas and the Dallas Landmark Commission for historic buildings and districts in Dallas, Texas, United States. Listed sites are selected after meeting a combination of criteria, including historical, economic, architectural, artistic, cultural, and social values. Once a structure or district is designated a Landmark it is protected by an ordinance with specific preservation criteria, which requires that any alterations beyond routine maintenance, up to and including demolition, must have their permit reviewed by the Landmark Commission.