Complex sentence: Kessenich was longtime the residence of the barons Michiels van Kessenich, who lived on an artificial hill (de Berg) in the center of the village, many years later, they moved to the castle of Kessenich called "Borgitter".
Split into simpler sentences: Kessenich was longtime the residence of the barons Michiels van Kessenich, who lived on an artificial hill (de Berg) in the center of the village. Many years later, they moved to the castle of Kessenich called "Borgitter".