Complex sentence: In 1841 the monastery was considered by the Russian Tsar as the "regular, of the second class"; was supposed to give shelter to the monks of the terminated units and after the death of the last one to be closed.
Split into simpler sentences: In 1841 the monastery was considered by the Russian Tsar as the "regular, of the second class". It was supposed to shelter the monks of the terminated units and after the death of the last one to be closed.