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In page Mitchell County Courthouse (Iowa):

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There was a dispute from 1855 to 1857 as to whether Mitchell or Osage should be the county seat of Mitchell County.[1] A commission of delegates from other counties chose Osage and construction was begun on the courthouse. Because another election was held to decide the issue construction was halted. Even though a final decision would not be made until 1870 the courthouse construction proceeded and the main block was completed in 1858. The Italianate style building cost $25,000 to complete.[2] The exterior was faced in brick and a silver domed cupola capped the structure. Two wings were added on either side of the main block in 1879 and 1882. A third wing was added to the rear of the building in 1926. The exterior was restored from 1975 to 1976.[3]