Charlemagne, or Karl der Große, was buried in Aachen Cathedral in 814. He chose Aachen as his favorite residence and made it the center of his empire. The Cathedral, with its impressive Palatine Chapel, became a site for the coronation of Holy Roman Emperors for centuries after his death, highlighting its immense historical significance.

Aachen is famous for its hot thermal springs, which have been used for their healing properties since ancient times. The Romans established baths here, calling the settlement "Aquae Granni." The springs still feed modern spa facilities and contribute to the city's identity as a historic spa town.

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From Otto I in 936 until Ferdinand I in 1531, over 30 German kings were crowned in Aachen Cathedral. This tradition solidified Aachen's role as a vital political and spiritual center of the Holy Roman Empire for more than six centuries, making it a truly imperial city.

Aachener Printen is a distinctive type of gingerbread, often spiced with cinnamon, anise, cloves, and cardamom. It's a protected regional specialty, cherished by locals and visitors alike. While traditionally hard, variations like soft Printen and those covered in chocolate are also popular.

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Aachen is situated in the "Dreiländereck" (Three-Country Corner), where Germany, Belgium, and the Netherlands meet. This unique geographical position has historically influenced its culture, trade, and even its dialect, making it a truly international city at the heart of Europe.

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RWTH Aachen University, or Rheinisch-Westfälische Technische Hochschule Aachen, is one of Germany's largest and most renowned technical universities. It's particularly famous for its engineering and natural sciences programs, attracting students and researchers from all over the world and significantly contributing to the city's innovation and economy.