Complex sentence: In 1093, Emperor Henry IV gave the Salian territories in Rhenish Franconia as a fief to Henry of Laach, the Count palatine of Lower Lorraine at Aachen, his lands then would evolve into the important principality of Electoral Palatinate.
Split into simpler sentences: In 1093, Emperor Henry IV gave the Salian territories in Rhenish Franconia as a fief to Henry of Laach, the Count palatine of Lower Lorraine at Aachen. His lands would evolve into the important principality of Electoral Palatinate.