Wikimedia Commons has media related to National Register of Historic Places in Mercer County, Ohio.
Pages in category "National Register of Historic Places in Mercer County, Ohio"
The following 17 pages are in this category, out of 17 total. This list may not reflect recent changes.
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- St. Aloysius Catholic Church (Carthagena, Ohio)
- St. Anthony's Catholic Church (Padua, Ohio)
- St. Charles Seminary
- St. Henry's Catholic Church (St. Henry, Ohio)
- St. John the Baptist Catholic Church (Maria Stein, Ohio)
- St. Rose's Catholic Church (St. Rose, Ohio)
- St. Sebastian's Catholic Church (Sebastian, Ohio)
- Shrine of the Holy Relics