Wikipedia: "Freimarkt (lit. Free Fair) in Bremen, Germany, first held in 1035, is the oldest fair in Germany. With more than four million visitors each year, it is also considered to be the biggest festival in Northern Germany.
It is celebrated for 17 days in the last two weeks of October, somewhat extended from Friday to Sunday. The area covers approximately 100,000 square meters on two areas: the so-called "Kleiner Freimarkt" (lit. Small Free Fair) on the market square, and the main area at the "Bürgerweide" adjacent to the Main Station and the Exhibition Center.
The highlight is the "Freimarktsumzug" (lit. Free Fair Procession) held on the second Saturday of the festival."
The 1,200 year old “Free Hanseatic City of Bremen” and its North Sea port sister of Bremerhaven make up a two-city state, which is the smallest of Germany’s sixteen states. The cities are separated by a mere 60 kilometers along the river Weser. Bremen is a center of technology, renowned for its leadership in aircraft construction and space station assembly as well as space propulsion systems. The city-state earned the distinction of being named the “City of Science” in 2005 as demonstrated by the science center “Universum Bremen” and the “EADS Astrium”.