Roman Catholic Archdiocese of Warsaw  The Archdiocese of Warsaw is a Catholic ecclesiastical territory or diocese in Poland encompassing the Polish capital. It was erected on October 16, 1798. It was elevated to an Archdiocese on June 30, 1813. A Metropolitan See, its suffragan dioceses are the Roman Catholic Diocese of Płock and the Roman Catholic Diocese of Warszawa-Praga. According to the church's statistics, 30.4% of the dioceses population attended a church weekly in 2013. That is higher than a year earlier (29.8%) but church attendance may still be declining. The current Archbishop, Kazimierz Nycz, formerly Bishop of Koszalin-Kolobrzeg, Poland, was named on 3 March 2007. Following the abrupt resignation of Archbishop Stanisław Wielgus in January, Józef Cardinal Glemp had been named its Apostolic Administrator.