 Felicjan Sypniewski was a scientist whose ground-breaking studies and scientific publications influenced the next generations of Polish naturalists and have laid down foundations of malacology and algology.Renowned sculptor Bolesław Sypniewski donated almost 2 years of his work for the mausoleum of the most famous leader of Second Polish Republic, Marshal Józef Piłsudski.His "Matka i Serce Syna" (Mother and Her Son's Heart) black granite tombstone is still laying there today in Vilnius's Rossa Cemetery in Lithuania (back then part of Poland), where – in accordance with his wishes – the heart of Marshal Piłsudski was buried in his mother's tomb.