Question: 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?
Facts:
The Wichita City Carnegie Library Building was built in 1915 in Sedgwick County, Kansas
The county seat of Sedgwick County, Kansas is Wichita, the most populous city in the state.
Answer: Wichita City Carnegie Library Building