Complex sentence: Gießen came into being as a waterside castle in 1152, built by Count Wilhelm von Gleiberg, although the history of the community in the northeast and in today's suburb called "Wieseck" dates back to 775.
Split into simpler sentences: Gießen came into being as a waterside castle in 1152, built by Count Wilhelm von Gleiberg. But the history of the community in the northeast and in today's suburb called "Wieseck" dates back to 775.