Catherine I of Russia (d. 1727)
Catherine I (Russian: Екатери́на I Алексе́евна Миха́йлова, tr. Yekaterína I Alekséyevna Mikháylova; born Polish: Marta Helena Skowrońska, Russian: Ма́рта Самуи́ловна Скавро́нская, tr. Márta Samuílovna Skavrónskaya; 15 April [O.S. 5 April] 1684 – 17 May [O.S. 6 May] 1727) was the commoner second wife and Empress consort of Peter the Great, and Empress Regnant of Russia from 1725 until her death in 1727.