Final answer:
Pope Gregory the Great was not responsible for creating the Papal States and did not write The Ecclesiastical History of the English People. However, he recognized the Byzantine emperor as the rightful ruler of Italy and made important contributions to asserting papal authority in different territories.
Step-by-step explanation:
Pope Gregory the Great was responsible for several important actions during his papacy, but he was not responsible for creating the Papal States. The Papal States were established in the 8th century, several decades after Pope Gregory the Great's reign. During his papacy, Gregory recognized the Byzantine emperor as the rightful ruler of Italy and played a significant role in asserting papal authority in various territories. Additionally, he contributed to the development of Christianity in England, but he did not write The Ecclesiastical History of the English People. It was actually written by the historian Bede in the 8th century.
Learn more about Pope Gregory the Great's responsibilities