Poland's first Functionalist Catholic church, Leon Dietz d’Army and Jan Zarzycki's breathtakingly simple design is worthy of further investigation. Built between 1930 and 1933, the plain exterior, which can also claim to have the only single corner tower on any church in the city, hides a sumptuous Art Deco interior including some fine sculptures, pews, lamps and stained glass. The church is also notable as being Katowice's official garrison church.