Kaiserslautern (German pronunciation) is a city in southwest Germany, located in the Bundesland (State) of Rhineland-Palatinate (Rheinland-Pfalz) at the edge of the Palatinate Forest (Pfälzerwald). The historic centre dates to the 9th century. It is 459 kilometres (285 miles) from Paris, 117 km (73 miles) from Frankfurt am Main, and 159 km (99 miles) from Luxembourg. Kaiserslautern is home to 100,569 people (December 2016). Additionally, approximately 45,000 NATO military personnel inhabit the city and its surrounding district (Landkreis Kaiserslautern), and contribute approximately US$1 billion annually to the local economy. The city is also home to football club 1. FC Kaiserslautern that has won the German championship four times.