Complex sentence: In 1875 he became a member of the revised committee directing the "Monumenta Germaniae Historica", himself undertaking the direction of the section "Antiquitates," and in 1888 became president of the central board in Berlin.
Split into simpler sentences: In 1875 he became a member of the revised committee directing the "Monumenta Germaniae Historica", himself undertaking the direction of the section "Antiquitates". In 1888 he became president of the central board in Berlin.