Büren an der Aare 
(usually abbreviated with
Büren a.A., means
Büren on the Aare) is a historic town and a municipality in the Seeland administrative district in the
Canton of Bern 
in Switzerland.
History
Büren an der Aare is first mentioned in 1185 as Buirro. In 1236 it was mentioned as Buron. The formerly independent village of Reiben was first mentioned in 1309. It became part of Büren an der Aare in 1911.
The earliest trace of humans in Büren are scattered neolithic and La Tene items.