Wittenberg, officially Lutherstadt Wittenberg, is a town in Saxony-Anhalt, Germany. Situated 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 Melanchthon memorial sites were added to the UNESCO world heritage list in 1996.