Complex sentence: During the 9th century the area was part of the duchy of Saxony, and in the 12th century it came under the rule of Esico (d.1059 or 1060).
Split into simpler sentences: During the 9th century, the area was part of the Duchy of Saxony. In the 12th century, it came under the rule of Esico (died 1059 or 1060).