John T. Cyphers House - Credit: Wikimedia Commons
The John T. Cyphers House is a historic house in Lakeland, Minnesota, United States. It was built in 1858 using an early form of concrete poured around undressed rock. It was listed on the National Register of Historic Places in 1971 for having state-level significance in the theme of architecture. It was nominated as a rare Minnesota example of Northern European-style masonry, particularly unusual in a logging region with plentiful lumber. Read more on Wikipedia
Source: en.wikipedia.org