The Archdiocese of Warsaw and the Diocese of Warsaw-Praga are the two ecclesiastical districts active in the city which serve the large Roman Catholic population of 1.4 million. The Lutheran Diocese of Warsaw is one of six in Poland; its main temple is the Holy Trinity Church from 1782, one of Warsaw's most important and historic landmarks. The Evangelical Reformed Parish (Calvinist) is leading the Polish Reformed Church. The main tserkva of the Orthodox Christians is Praga's Cathedral of St. Mary Magdalene from 1869. The Jewish Commune of Warsaw (''Gmina Wyznaniowa Żydowska'') is one of eight in the country; Chief Rabbi of Poland Michael Schudrich resides in the city. There are also 3 active synagogues, one of which is the pre-war Nożyk Synagogue designated for Orthodox Jews. An Islamic Cultural Centre in Ochota and a small mosque in Wilanów serve the Muslims.