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Ratis Bona. Regensburg Ratis Bona Reprint von CIVITATES ORBIS TERRARUM Georg Braun Franz Hogenberg Kln PDold original upload log de Jutta CommonsHelper Regensburg Ratis Bona source Reprint von CIVITATES ORBIS TERRARUM author Georg Braun Franz Hogenberg Kln permission BildPDalt PDold Historic views of Regensburg in art