Bogurodzica is tranlated “Mother of God.” It is the oldest Polish religious hymn and was written somewhere between the 10th and 13th centuries.
I learned about Bogurodzica today from my friend Jurek who is helping me learn Polish via Skype. We’ve been meeting once a week for an hour or two and he has been extremely helpful. In the course of our conversation today he told me about this ancient hymn which was sang by the Polish Knights as an anthem before the Battle of Grunwald (1410) and the Battle Of Varma (1444), both very important battles, not only in the history of Poland, but for the fate and history of Europe. Bogurodzica was also used at the coronation ceremonies of the first Jageillonian kings.
You can read more about Bogurodzica here: http://en.wikipedia.org/wiki/Bogurodzica.
You can hear it here: http://www.youtube.com/watch?v=ZgtTapXGWXA
It is very intersting and well worth a few minutes of your time.