My grandfather, dr. Sándor Polgár was the second son of a Jewish family the members of which were at home in northwestern Hungary since generations as were the family of his wife Margit Csillag. He attended Benedictine secondary school in Győr and completed his studies at the Faculty of Sciences in Budapest where he got a teaching diploma for sciences at secondary school level. After that he obtained his PhD degree in aquatic plants. Beside science and pedagogy he was also interested in philosophy and music and he spoke fluent German and French. A number of his students became later successful scientists in Hungary and abroad. He was murdered together with my grandmother and a large number of his family members in Auschwitz.