United States National Register of Historic Places |
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Iowa - Architect - Fridolin Heer
| Andrew-Ryan House |
| Basilica of St. Francis Xavier, Church and Rectory |
| Corpus Christi Church |
| Dubuque County Courthouse |
| Sacred Heart School |
| Security Building |
| St. Lawrence Catholic Church |
| Town Clock Building |
Data from United States Park Service and Wikidata