The Roman Catholic Diocese of Ostrava-Opava (Latin: Ostravien(sis)-Opavien(sis) ) is a suffragan Latin diocese in the Ecclesiastical province of the Archdiocese of Olomouc in Moravskoslezský kraj, Moravia, in the Czech Republic.
The cathedral episcopal see is Katedrála Božského Spasitele, dedicated to the Divine Saviour, in Ostrava, and it also has
a Co-Cathedral, the Konkatedrála Nanebevzetí Panny Marie, in Opava, dedicated to the Virgin Mary
a Minor Basilica: Bazilika Navštívení Panny Marie, in Frýdek-Místek, dedicated to the Virgin Mary
Established on May 30, 1996 as Diocese of Ostrava–Opava / Ostravien(sis)–Opavien(sis) (Latin), on territory split off from its Metropolitan, the Archdiocese of Olomouc, which territory was part until 1978 of the then Diocese of Wroclaw (Breslau, Poland) while that comprised all Silesia.
As per 2014, it pastorally served 429,300 Catholics (32.7% of 1,314,000 total) on 6,150 km² in 276 parishes and a mission with 247 priests (188 diocesan, 59 religious), 30 deacons, 218 lay religious (76 brothers, 142 sisters) and 8 seminarians.
(all Roman rite)
Suffragan Bishops of Ostrava-OpavaFrantišek V. Lobkowicz, Norbertines (O. Praem.) (30 May 1996 - ), Vice-President of Czech Bishops’ Conference (2005.01 – 2010.04.21); previously Titular Bishop of Catabum Castra (1990.03.17 – 1996.05.30) as Auxiliary Bishop of Archdiocese of Praha (Prague, Czech Republic) (1990.03.17 – 1996.05.30)
Auxiliary bishop : Martin David (2017.04.07 – ...), Titular Bishop of Thucca in Numidia (2017.04.07 – ...).