Aachen is a historic city located in the state of North Rhine-Westphalia, Germany. Known for its rich history and cultural significance, Aachen is a popular tourist destination and a vibrant hub of activity. The city is famous for its stunning architecture, particularly the Aachen Cathedral, which is a UNESCO World Heritage Site. This impressive cathedral is a masterpiece of medieval architecture and houses the Palatine Chapel, where Charlemagne was crowned as the first Holy Roman Emperor in the 9th century. The cathedral attracts visitors from all over the world who come to admire its intricate design and historical significance.