The first professional geodetic network on Polish soil was established in 1829-1835. It was created for the mines and factories of the Old Polish Industrial District, which remained the largest centre of mining and metallurgy in Poland until the end of the 19th century. The main measuring point was established on the summit of Mount Łysica in the Świętokrzyskie Mountains. However, it was promptly destroyed and, despite detailed data published by one director of the project, Professor F.S. Armiński, it has only recently been rediscovered. Test excavations undertaken in 2019 revealed numerous inconsistencies between the archival data and the actual construction of the uncovered foundations.
The article describes the hitherto unknown remains of the measuring station from 1828, determined by Franciszek Armiński as the starting point of the reference system for the Triangular Network of the Old-Polish Industrial Region in 1829–1835. The author also presents postulates regarding the protection of the discovered residues and popularization of knowledge about them.
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