Guided architectural tour of 6 historic southside Ypsi houses and the elegant downtown Ypsi District Library, built in 1915 as a Carnegie post office. VIP ticket includes refreshments and a tour of the restored C. King & Co. Cafe building. Noon–5 p.m., 402 S. Washington, Ypsi. $30 (VIP ticket, $65) in advance at bit.ly/ypsihist-10-4-26 & (if available) at the door. (734) 845–7024, [email protected].