One Charles Center is a historic office building located in Baltimore, Maryland, United States. It is a 23-story aluminium and glass International Style skyscraper designed by Ludwig Mies van der Rohe and constructed in 1962. It was the first modernistic office tower in Baltimore and part of the city's downtown urban renewal movement. The base consists of a concrete-faced podium topped by a paved plaza, with the T-shaped office tower atop. The tower includes metal trim and gray glass.