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Polish stamp showing a photograph made in 1866 by Polish 19th century photographer Karol Beyer (1818 - 1877), showing "Russian troops camp site at Plac Zamkowy [Castle Square] in Warszawa".
2008, 29 February (date of issue)
Private collection of Krzysztof Slowinski
The stamp is part of 4-stamp set "History of Polish photography".