Complex sentence: The History of Hesse began when the cultural area known as Hesse came into existence in 1568, as the portion granted to George, youngest of the four sons of Landgrave Philip I of Hesse.
Split into simpler sentences: The History of Hesse began when the cultural area known as Hesse came into existence in 1568. The portion was granted to George, youngest of the four sons of Landgrave Philip I of Hesse.