United States National Register of Historic Places |
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Marconi Wireless-Synanon Tomales Bay Headquarters Historic District (Boundary Increase)
| NRHP ID: 100011433 |
| NARA ID: 123859717 |
| Location (in/near): Marshall, California |
| Listed: 2025-01-31 |
| Role: District |
| Significance region: National |
| Significance area(s): Communications |
Data from United States Park Service and Wikidata