<Table> <Tr> <Td> </Td> <Td> Breves dies hominis Breves dies hominis, Notre Dame school . </Td> </Tr> <Tr> <Td_colspan="2"> Problems playing this file? See media help . </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> Breves dies hominis Breves dies hominis, Notre Dame school . </Td> </Tr> <Tr> <Td_colspan="2"> Problems playing this file? See media help . </Td> </Tr> <P> The Notre Dame school or the Notre Dame school of polyphony refers to the group of composers working at or near the Notre Dame Cathedral in Paris from about 1160 to 1250, along with the music they produced . </P>

Who were the two famous choirmasters of notre dame in paris