Complex sentence: The Christian church forbade such practices and until the 14th century, when the first recorded dissection of a human corpse took place in Bologna, anatomical research was limited to the dissection of animals.
Split into simpler sentences: The Christian church forbade the study of human anatomy until the 14th century, when the first recorded dissection of a human corpse took place in Bologna. Until then, anatomical research was limited to the dissection of animals.