Wittenberg, officially Lutherstadt Wittenberg, is a city in Germany in the Bundesland Saxony-Anhalt, on the river Elbe. It has a population of about 50,000.

The importance of Wittenberg historically was due to its seat of the Elector of Saxony, a dignity held by the dukes of Saxe-Wittenberg and also to its close connection with Martin Luther and the dawn of the Protestant Reformation; several of its buildings are associated with the events of this time. Part of the Augustinian monastery in which Luther dwelt, first as a monk and later as owner with his wife and family, is preserved and considered to be the world's premier museum dedicated to Luther. Various Luther and Melancthon memorial sites were added to the UNESCO world heritage list in 1996.

A settlement was first mentioned in 1180 as a small village founded by Flemish colonists under the rule of the House of Ascania. In 1260, it became the residence of the dukes of Saxe-Wittenberg, and in 1293 the settlement was granted a town charter. Wittenberg developed into an important trade centre during the following centuries, due to its location. When the Ascanians died out, Saxe-Wittenberg passed to the House of Wettin. The city became an important regional political and cultural centre at the end of the 15th century, when Frederick III "the Wise", Elector of Saxony, took up residence in Wittenberg. Several parts of the city were extended soon afterward: the second bridge over the Elbe was built from 1486 to 1490 and the castle church, the Schlosskirche, was built from 1496 to 1506. The palace was rebuilt the same time.