Ostrov Vetren [Bulgaria] - Historical maps
Ostrov Vetren, Vetren, Ветрен, Остров Ветрен
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Europe in the XIX. century
Europe in the XIX. century (with the Third Military Survey)
Europe in the XVIII. century
Lesser and Greater Wallachia (Oltenia and Muntenia) (1790)
Wallachia - Second military survey of the Habsburg Empire
