The following subject headings are great places to start:
- Historic preservation
- Historic buildings
- Historic house museums
- Historical museums
- Historic sites
- Cultural property
- Historic districts
- Antiquities
From there, you can use a variety of different source types to continue to narrow down your search:
- Bibliography
- Directories
- Handbooks Manuals Etc
- Historiography
- Catalogs
- Guidebooks
Or by theme:
- Repair and reconstruction
- Conservation and restoration
- Planning
- Safety Measures
You can also use geographic limiters by nation, region, or state:
- United States
- Great Britain
- England
- France
- Germany
- Europe
- California
- Washington D C