Last week we concluded our series on the history of the former “Tonnancour” estate as we explored one of the new sub-divisions located on the former 63-acre property – Tonnancour Place. This prestigious street in Grosse Pointe Farms is now the location of many fine residences, which over the years have had several notable residents.

The week we delve deeper into the history of one of the residents of Tonnancour Place, Elma C. Mennen, and take a look at the two stunning homes she had constructed in Grosse Pointe. Both were designed by the renowned architect, Hugh T. Keyes.

Elma Christina Mennen was a prominent figure in the City of Detroit. Born in Newark in 1885, she came from a prosperous family - her father, Gerhard Heinrich Mennen, founded…

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