The following is a timeline of the history of the city of Basel (or Basle, in the once-preferred English spelling).
Established in the 4th century, the city rose to importance in the medieval period as a bishop's seat.
Basel joined the Swiss Confederacy in 1501.
In the 19th century, Basel was a center of Industrialisation, and it remains one of the major cities of contemporary Switzerland.
This article incorporates information from the German Wikipedia.