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between 1924 and 1927. stefan krukowski and Zygmunt Szmit started their researches in Krzemionki Opatowskie in 1928. In the same year Krukowski became the curator of the mine. The mine has been protected by law since 1928. Krzemionki Opatowskie is an open archaeological museum at present, and it is still a center of archaeological interest, mainly from the State Archaeological Museum in Warsaw.