Iowa - O Brien County

O Brien County Iowa has 4 places on the National Register of Historic Places including 1 place of National significance. Significant places include Indian Village Site, Carnegie Library, O'Brien County Courthouse.

Prehistoric cultural affiliation(s) include Middle Missouri and Mill Creek dating back to 500.

Some of the country's most noteable architects helped create the O Brien County places including Smith & Loeffer and J.E. Lovejoy. Prominent architectural styles found in O Brien Country are Beaux Arts.

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