Mariemont, Belgium, former hunting estate created in 1546 by Queen Mary of Hungary
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Mariemont, Ohio, planned community in Hamilton County, Ohio, United States
In 1767 he was appointed court architect to the Goveror of the Austrian Netherlands, Charles-Alexandre de Lorraine for whom he built the Castle of Mariemont which was demolished in the aftermath of the French revolution.
Louis Montoyer (1749, Mariemont, Austrian Netherlands, now Belgium – 5 June 1811, Vienna) was an 18th-century Belgian-Austrian architect, principally active in Brussels and Vienna.