The official currency is the euro. You can exchange foreign currencies easily in banks and exchange offices.
Language
The official language is German, although the Ripuarian Franconian dialect and Limburgish, a lingua franca typical of this border region, are also spoken.
Internet
Aachen has good Internet access throughout the historic centre. In hotels it is also usually very good.
Weather
Summers are hot, with temperatures that can reach 29⁰C. Winters are cold and windy.