ArchitectRocco GuerriniItalian architect and military engineer (1525-1596), 1525–1596Photograph of one of their buildings · Königlich Preußische Messbildanstalt · Public domain · Wikimedia Commons3 buildingsGermanyFurther readingWikipedia article↗BuildingsBerlin PalaceBerlin, GermanyMetz CitadelMetz, FranceSpandau CitadelBerlin, Germany