Nikolaus Gross worked as coal miner in Germany before becoming editor of the union newspaper. Married with seven children, he actively resisted the Nazi movement, which led to the paper's suppression.
Gross was imprisoned in August 1944 and hanged on January 23, 1945. It was reported about the execution: "Gross bowed his head silently during the blessing. His face already seemed illuminated by the glory into which he was getting ready to enter." Nikolaus Gross was beatified in 2001.