Start of a list…..
Olmstead Center for Landscape Preservation promotes the stewardship of significant landscapes through research, planning and sustainable preservation maintenance.
Advisory Council on Historic Preservation promotes the preservation, enhancement, and sustainable use of our nation’s diverse historic resources, and advises the President and the Congress on national historic preservation policy.
State Historic Preservation Officers (SHPO) play a critical role carrying out many responsibilities in historic preservation. Surveying, evaluating and nominating significant historic buildings, sites, structures, districts and objects to the National Register is one such key activity. Each state has their own officer who would be the best resource for information for your state.
The National Trust for Historic Preservation are a privately funded nonprofit organization working to save America’s historic places.
The Garden Conservancy preserves exceptional American gardens for the education and enjoyment of the public.
American Public Gardens Association (APGA) is advancing Public Gardens as a force for positive change in their communities through national leadership, advocacy and innovation.
American Society of Landscape Architects (ASLA) mission is to lead, to educate, and to participate in the careful stewardship, wise planning, and artful design of our cultural and natural environments.
Tribal Preservation Program assists Indian tribes in preserving their historic properties and cultural traditions through the designation of Tribal Historic Preservation Offices (THPO) and through annual grant funding programs.