Christian Ernst of Brandenburg-Bayreuth was a member of the House of Hohenzollern and Margrave of Brandenburg-Bayreuth.

Bayreuth is a town in northern Bavaria, Germany, on the Red Main river in a valley between the Franconian Jura and the Fichtel Mountains. The town's roots date back to 1194. In the 21st century, it is the capital of Upper Franconia and has a population of 72,148 (2015). It hosts the annual Bayreuth Festival, at which performances of operas by the 19th-century German composer Richard Wagner are presented.