Complex sentence: The sign on the bridge still proclaims it as "Ball's Bridge" in recognition of the fact that the original bridge on that location was built and owned by the Ball family, a well-known Dublin merchant family in the 1500s and 1600s.
Split into simpler sentences: The sign on the bridge still proclaims it as "Ball's Bridge" in recognition of the fact that the original bridge in this location was built and owned by the Ball family. The Balls were a well-known Dublin merchant family in the 1500s and 1600s.