Maureen Feighan, The Detroit News, April 29, 2018 (Junior League of Detroit’s Show House Sneak a Peek weekend)

Just how grand is the Charles T. Fisher mansion in Detroit’s Historic Boston-Edison neighborhood, the largest privately owned home in district?

It has a ballroom and a small gymnasium.

The ballroom is in the basement, which also has a pub, billiards room and liquor vault. The gym is on the third floor of the house, which was built for Fisher and his wife Sarah.

Both were available for a tour Sunday as part of the Junior League of Detroit’s Sneak a Peek weekend that let guests inside the 1922 mansion before its big makeover as the league’s 2018 Designers’ Show House. Visitors on the tour were not allowed to take photos of the mansion’s interior.