What Carnegie library building located in the most populous city in Kansas was built in 1915, and listed on the National Register of Historic Places in 1987?
Sedgwick County, Kansas Sedgwick County (county code: SG) is a county located in the U.S. state of Kansas. As of the 2010 census, the population was 498,365, making it the second-most populous county in Kansas. The county seat is Wichita, the most populous city in the state.
Olathe, Kansas Olathe ( ) is a city in, and is the county seat of, Johnson County, Kansas, United States. Located in northeastern Kansas, it is also the fourth most populous city in the state, with a population of 125,872 recorded by the 2010 census. Olathe is also the fourth-largest city in the Kansas City metropolitan area. It is bordered by the cities of Lenexa to the north, Overland Park to the east, De Soto to the northwest, and Gardner to the southwest.