www.zitadelle-spandau.de

Anchor text: official web site Spandau Citadel

Wikipedia: Spandau Citadel

Anchor text: Historical infos about the Citadel on its official site

Wikipedia: Spandau (locality)

Anchor text: Zitadelle Spandau: ''DIGITALISM ART - die geniale Welt des Petrus Wandrey'' (retrieved 2 June 2014)

Wikipedia: Petrus Wandrey

Anchor text: zitadelle-spandau.de

Wikipedia: Rocco Guerrini