Old Polish literature

thumb|right|Bogurodzica performed by Collegium Vocale Bydgoszcz '''' (, calque of the Greek term Theotokos), in English known as the Mother of God, is a medieval Christian hymn composed sometime between the 10th and 13th centuries in Poland. It is believed to be the oldest religious hymn or patriotic anthem in the Polish language, which was traditionally sung in Old Polish with the Ancient Greek phrase Kyrie eleison'' . While its origin is not entirely clear, several scholars agree that Saint Adalbert of Prague is the likely author. Polish knights chanted Bogurodzica prior to their engagement