Arlington County, United States (1993) Kostroma, Russia (2005, suspended since March 2022) Sarıyer, Istanbul, Turkey (2013) Cape Town, South Africa (2017) See also Aachen (district) Aachen Prison Aachen tram Aachener Aachener Chronik Aachener Bachverein List of mayors of Aachen Council of Aachen Treaty of Aix-la-Chapelle (disambiguation) Maastricht Aachen Airport Computer museum Aachen Notes References Sources Further reading Rice, Eric, Music and Ritual at Charlemagne's Marienkirche in Aachen. Kassel: Merseburger, 2009. External links Aachen (district) Belgium–Germany border crossings Catholic pilgrimage sites Cities in North Rhine-Westphalia 1st century Free imperial cities Jewish German history Matter of France Populated places established in the 1st century Rhineland Roman towns and cities in Germany 765 Spa towns in Germany