byrd wrote music for the anglican church and for the roman catholic church. his "cantiones sacrae" published in 1589 and 1591 are collections of latin motets. these are the very best of byrd’s works, and better than anything that was being written in europe at that time. he probably wrote them for private (illegal) gatherings of catholics, so this meant that he could write in whatever style he wanted. his music is very contrapuntal, representing the best of the english renaissance style.