1893 to 1897. He was pastor of Sacred Heart Church in Fort Dodge, Iowa when named Auxiliary Bishop of Sioux City. He received his episcopal consecration on April 8, 1919 from Archbishop James Keane. As an auxiliary, he served as rector of the Cathedral of the Epiphany. Heelan was named the second Bishop of Sioux City on March 8, 1920. During his nearly thirty-year tenure, he guided the diocese through the Great Depression and World War II, and greatly expanded Catholic education. He died 20 September 1948 at age 80. Heelan was succeeded by his coadjutor, Joseph Maximilian Mueller. Born in St. Louis, Missouri, Mueller studied at Pontifical College Josephinum in Columbus, Ohio and was ordained on June 14, 1919. He then served as rector of St. Peter's Cathedral in Belleville, Illinois. He was named a Domestic Prelate in 1939. On August 20, 1947, Mueller was appointed Coadjutor Bishop of Sioux City, Iowa. Upon the death of Bishop Edmond Heelan, Mueller became succeeded the third Bishop of Sioux City. During his 22-year-long tenure, he presided over a period of great expansion in the diocese. He built several new schools, churches, and other parish facilities. He also attended all four sessions of the Second Vatican Council between 1962 and 1965. After reaching the mandatory retirement age of 75, Mueller retired as Bishop. Upon the resignation of Bishop Mueller, Pope Paul VI appointed a native Iowan, auxiliary bishop Frank Henry Greteman, as the fourth Bishop of Sioux City. Greteman held a Licentiate of Sacred Theology from the Pontifical North American College in Rome, and a Licentiate of Canon Law from the Catholic University of America. He was named a Domestic Prelate in 1953, and vicar general of the Sioux City Diocese in 1965. On April 14, 1965, Greteman was appointed Auxiliary Bishop of Sioux City. The primary focus of his episcopate was Catholic education. Upon reaching the mandatory retirement age of 75, Greteman submitted his letter of resignation to Pope John Paul II in December 1982. The Pope accepted the resignation of Bishop Greteman's resignation as ordinary and named him apostolic administrator. On June 15, 1983, John Paul appointed Lawrence D. Soens, pastor of St. Mary Church, Clinton, Iowa, as the fifth ordinary of the Diocese of Sioux City. His ordination and installation were held Aug. 17, 1983, at the Cathedral of the Epiphany, Sioux City. During his period of tenure, a