Question: What is the date of death of Tsarevna Catherine Ivanovna Of Russia's mother?
Answer: 13 October 1723

By her marriage, she was a Duchess of Mecklenburg-Schwerin. Praskovia Fyodorovna Saltykova  (12 October 1664 – 13 October 1723) was the tsaritsa of Russia as the only wife of Ivan V of Russia. She was the mother of Empress Anna of Russia