premise: The William Tanner House Museum, also known as the William A. Tanner House, is a historic residence and museum in Aurora, Illinois. It was built in 1857 for William A. Tanner, a hardware merchant. His descendants lived in the house until it was donated to the Aurora Historical Society in 1936. It now operates as a Victorian-period historic house museum.
hypothesis: William Tanner was alive for the turn of the century.
reason: The paragraph doesn't state when he died so he may or may not have been living in 1900.