Tour by advance reservation Monday to Saturday at 1 p.m. to go inside the National Historic Landmark home / museum where Alcoholics Anonymous (A.A.) cofounder Bill Wilson (a.k.a. Bill W.) and Al-Anon Family Groups cofounder Lois Wilson lived from 1941 to 1971 and 1988 respectively at 62 Oak Rd., Katonah, NY 10536 in northern Westchester County, New York. Entry into the Wilson home and Bill's writing studio is only by tour reservation (self-guided indoor tours not available). Lois founded the nonprofit, tax-exempt Stepping Stones Foundation (Federal ID# 13-3031164) in 1979. Donations assist its mission to foster public understanding of alcoholism and inspire recovery by preserving and sharing the Wilson home, archive, and legacy.