Complex sentence: At the death of his father on 29 March 1913 he inherited the throne of the Principality, as well he continued the regency of Reuss Elder Line, because of a physical and mental disability of Prince Heinrich XXIV due to an accident in his childhood.
Split into simpler sentences: At the death of his father on 29 March 1913 he inherited the throne of the Principality. He also continued as regent of Reuss Elder Line, because of a physical and mental disability of Prince Heinrich XXIV due to an accident in his childhood.