In 1997 he won the National French Song Contest (which was held in Radziejów) and received 1st place.
Though no dedicated Radziejów station was built, the inhabitants of the town could board trains in nearby Chełmce.
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In 1946 they organized a local branch of the Central Committee of Polish Jews (Centralny Komitet Żydów Polskich), which functioned until 1948 by which time most of its members left Radziejów.
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After the murder on the night of 29/30 September 1945 of two Jews in nearby village Osięciny, Radziejów's Jews fled the town, but returned a few weeks later.
Radziejów | Witoldowo, Radziejów County | Teodorowo, Radziejów County | Stróżewo, Radziejów County | Latkowo, Radziejów County | Jarantowice, Radziejów County | Iłowo, Radziejów County | Budzisław, Radziejów County | Bronisław, Radziejów County | Broniewo, Radziejów County | Bodzanowo, Radziejów County |
In addition Salomea received the town of Łęczyca, several castles and towns throughout Poland (including Pajęczno, Małogoszcz, Radziejów, Kwieciszewo) as her Oprawa wdowia (Widow's seat or wittum); this was the first documented case where a Polish ruler left his widow her own piece of land.