In 1939 Fr Walter Ciszek, a Polish-American Jesuit serving in Poland was swept up by the Red Army and sent to a labor camp in Russia. When his identity was discovered he was arrested as a spy and confined for 5 years of solitary confinement in Moscow: his “school of prayer.”

This is a fascinating story and reminds me of my mother's cousin, John H. Noble. He and his family lived in Dresden at the end of WWI and he and his father were arrested by the Soviet Russians for transporting former POW U.S. soldiers to the west. He and his father spent 9 & 7...

...years, respectively under Soviet control. John spent some of this time in Vorkuta, a coal producing gulag. He was released in 1955, partly the result of a note he had passed out of Russia. I learned of his story from his book "I Found God in Soviet Russia". Wikipedia page...