Katowice is the seat of the Roman Catholic Archdiocese, with the suffragan bishoprics of Gliwice and Opole, and around 1,477,900 Catholics. The Cathedral of Christ the King, constructed between 1927 and 1955 in a classicist style, is the largest cathedral in Poland. There are 36 Catholic churches in Katowice (including two basilicas), as well as 18 monasteries. Katowice is also a seat of a diocesan Catholic seminary, as well as one of the Order of Friars Minor. Katowice Archdiocese owns several media companies headquartered in Katowice: "Księgarnia św. Jacka", a Catholic publishing company, and "Instytut Gość Media", a multi-channeled media company that owns "Radio eM", a regional Catholic radio, and a few magazines. Gość Niedzielny, owned by "Instytut Gość Media" and published in Katowice, is currently the most-popular Catholic magazine in the country with approx. 120,000 copies sold weekly.