The epitaph plaque from 1870 commemorates Józef Karol Drda, who performed many honourable functions in Wieliczka. It was made of the so-called black Dębnik marble, i.e. black limestone, which was called marble because of its unusual polishing and shining properties.
Agata Felczyńska , "Epitaph plaque of Józef Karol Drda", [in:] "The Sacred Lesser Poland Heritage", 2025, source: https://sdm.upjp2.edu.pl/en/works/epitaph-plaque-of-jozef-karol-drda