Complex sentence: His father, Laurentius Blumentrost the Elder, who was of German origins and was personal physician to Tsar Alexis, taught him Latin and Greek, and he then studied under Justus Samuel Scharschmidt and at Pastor Glück's Lutheran school in the German settlement in Moscow.
Split into simpler sentences: His father, Laurentius Blumentrost the Elder, who was of German origins and was personal physician to Tsar Alexis, taught him Latin and Greek. He then studied under Justus Samuel Scharschmidt and at Pastor Glück's Lutheran school in the German settlement in Moscow.