The Islamic Center of Washington sits on Massachusetts Avenue among the foreign embassies that give the street its informal name, Embassy Row, a location its founders chose deliberately for a building meant to represent the wider Muslim world within the American capital rather than to serve a single national or ethnic community. Planning began in the 1940s, driven substantially by foreign diplomats stationed in Washington who wanted a place of worship, and the project drew contributions from numerous Muslim majority governments and private donors across the Islamic world.
The building's design fell to Mario Rossi, an Italian architect who had already built mosques in Egypt and brought that experience to a structure combining a minaret, dome and interior ornament drawn from across the historic Islamic world: Egyptian and Turkish tile work, Persian carpets and calligraphy contributed by artisans and donor states.
When the mosque was dedicated in 1957, it stood among the first mosques purpose built as such anywhere in the United States, most earlier American Muslim communities having adapted existing buildings rather than constructing dedicated ones. President Dwight Eisenhower spoke at the dedication, addressing the importance of religious liberty before an audience that included ambassadors from across the Muslim world.
That dual function has continued. The center serves Washington's own Muslim community for regular prayer and religious education, while also functioning as a site visiting Muslim heads of state are frequently brought to, and as one of the most visible expressions of Islam's institutional presence in the American capital, its minaret rising among the chanceries of the diplomatic community that helped build it.