Germany(North Rhine-Westphalia) - Aachen

Aachen  is a spa town in North Rhine-Westphalia, Germany. Sometimes in English (especially in old use), the city is referred to as Aix-la-Chapelle (French pronunciation: ​[ɛkslaʃapɛl]). Aachen was a favoured residence of Charlemagne, and later the place of coronation of the German kings. Geographically, Aachen is the westernmost city of Germany, located along its borders with Belgium and the Netherlands, 61 km (38 mi) west-southwest of Cologne.
Aachen Cathedral, frequently referred to as the "Imperial Cathedral" (in German: Kaiserdom), is a Roman Catholic church in Aachen, Germany. The church is the oldest cathedral in northern Europe and was known as the "Royal Church of St. Mary at Aachen" during the Middle Ages. For 595 years, from 936 to 1531, the Aachen chapel was the church of coronation for 30 German kings and 12 queens. The church is the episcopal seat of the Diocese of Aachen.

The Gothic Aachen Rathaus, or "Aachen City Hall", lies next to the Aachen Cathedral and is one of the most striking structures in the Altstadt of Aachen, Germany. 
In the first half of the 14th century, Aachen’s citizenry built the City Hall under the leadership of its acting mayor Gerhard Chorus (1285–1367) as a sign of their civic freedom, though they did have to promise to establish a space in the new City Hall that could host the traditional meal that accompanies new coronations. Up to then, the nearby mid-13th century Grashaus (which is one of the city’s oldest still-standing structures) had served the community in that function. Construction began in 1330 on top of the foundations walls of the Aula Regia, part of the derelict Palace of Aachen, built during the Carolingian dynasty. Dating from the time of Charlemagne, the Granus Tower was incorporated into the structure as well. Additionally, masonry from that era was incorporated into the south side of the building as well. The structure was completed in 1349, and while the City Hall served as the administrative center of the city, part of the city’s munitions and weaponry was housed in the Granus Tower, which also served for some time as a prison.

The Ahr valley (German: Ahrtal) is named after the Ahr, a left tributary of the River Rhine in Germany. It begins at the Ahr spring (Ahrquelle) in Blankenheim in the county of Euskirchen (North Rhine-Westphalia) and runs generally eastwards.