Mieczysław Żywczyński was born on January 13, 1901 and died on February 21, 1978. Mieczysław Żywczyński would have been 77 years old at the time of death or 111 years old today.
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Mieczysław Halka Ledóchowski was born on October 29, 1822 and died on July 22, 1902. Mieczysław Halka Ledóchowski would have been 79 years old at the time of death or 189 years old today.