 Its architecture and streetscape are still strongly evocative of its original plans.A large portion of the community was listed on the National Register of Historic Places in 1979; a larger area (fully encompassing the first listing) was designated a National Historic Landmark (as Village of Mariemont) in 2007.Mariemont is a village located about east of downtown Cincinnati in Hamilton County, on United States Route 50 (aka Wooster Pike), which serves as the principal route through the community.