List of Famous Castles
Historic views of Heidelberg Schloss
Historic views of Heidelberg in Germany.
The Heidelberg castle and town by Matthäus Merian.
http://commons.wikimedia.org/wiki/User:Immanuel_Giel, Immanuel Giel
Public domain to Australia, the European Union and those countries with a copyright term of life of the author plus 70 years.