Description:Unter den Linden, which sits at the heart of the historic section of Berlin, developed from a bridle path laid out by Elector John George of Brandenburg in the 16th century to reach his hunting grounds in the Tiergarten. It was replaced by a boulevard of linden trees planted in 1647, extending from the city palace to the gates of the city, by order of the “Great Elector” Frederick William.(3:39)