The Glensheen Mansion is celebrating its anniversary by offering visitors free tours of the historic Lake Superior home.
Thursday's community day is celebrating the 36th anniversary of the home opening to the public as a museum, the museum's website notes.
The free standard house tours will be offered from 9 a.m.-4 p.m. on a first-come, first-serve basis. To get your free ticket, visit the ticket house in person at the base of the Glensheen parking lot.
Tickets are usually gone by early afternoon, the museum notes.
Community Day also kicks off the estate's return to its summer schedule, offering tours seven days a week.
Robert was the youngest of the Congdon children.