Complex sentence: Steuben eventually sold the New Jersey property to a son of the previous owner, and it remained in the Zabriskie family until 1909, so today it is the only remaining eighteenth-century building that von Steuben owned.
Split into simpler sentences: Steuben eventually sold the New Jersey property to a son of the previous owner, and it remained in the Zabriskie family until 1909. It is the only remaining eighteenth-century building that von Steuben owned.