The Bull of Gniezno (officially Ex commisso nobis) was a papal bull issued on July 7, 1136 by Pope Innocent II. The bull split Archbishop of Magdeburg from the rest of the Polish church. From a historical perspective, the bull is especially important as it contains the earliest written record of the Polish language. Slavic language scholar Aleksander Brückner called the document a "złotą bullą języka polskiego" (the golden bull of the Polish language).