Like most of the Hamburg area, after the
Reformation Hamm was mostly
Lutheran. After the Church of the Trinity was built in 1693 Hamm was its own parish, which initially also comprised
Horn and part of
Eilbek. In the 19th and 20th centuries an increase in population led to the foundation of multiple daughter-parishes (Dankeskirche 1895, Wichernkirche 1934, Pauluskirche 1955, Simeonkirche 1965/66), some of which reunited into a larger parish (with 7400 parishioners) because of lowered membership. Since the 1950s there have been a Catholic community (Herz Jesu Hamm) and a number of
free churches (a Methodist church, a Baptist church, and an
independent Evangelical-Lutheran church) in Hamm. In recent times a Greek Orthodox church and a mosque have been added. ==References==