Admittance is $5 donation. It's well worth it! The lady who admitted us, couldn't have been nicer. She walked with us through the Main floor, telling us all kinds of cool facts and some really great stories, about the original owners, and the role the Mansion played in the history of St. Joseph. There was even a ghost story, about the basement. After that, we were able to go on our own and explore the upper levels. Amazing structure, with incredible objets d'Art, even wild aminals. One important thing, make sure you call for a time to visit, as they aren't open everyday. Leave a message, they're really good about returning calls quickly.
I believe it was $5-6
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