United States National Register of Historic Places |
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Illinois - Architect - Helfensteller, Hirsch & Watson
| Alton Chapter House |
| Andover Chapter House |
| Annawan Chapter House |
| Carlinville Chapter House |
| Carmi Chapter House |
| Edwardsville Chapter House |
| Marine Chapter House |
| Princeton Chapter House |
| Zion Chapter House |
Data from United States Park Service and Wikidata