Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Old Worth County Courthouse (Northwood Iowa) - The Old Worth County Courthouse in Northwood Iowa United States was built in 1880. It was listed on the National Register of Historic Places in 1981 as a part of the County Courthouses in Iowa Thematic Resource. The courthouse was the first building the county used for court functions and county administration. The building functions as the Main Museum for the Worth County Historical Society.
A:
Building