The Cathedral Basilica of St. Mary (Romanian: Catedrala romano-catolică Adormirea Maicii Domnului; Hungarian: nagyváradi Nagyboldogasszony székesegyház) also called the Catholic Cathedral of the Assumption, is the cathedral church of the Latin Diocese of Oradea Mare. It is located at 2 Șirul Canonicilor Street, Oradea, Romania.

The basilica was built between 1752 and 1780, and was designed by Italian architect Giovanni Battista Ricca (1691-1757). After the death of the first architect, construction was completed by the Viennese Franz Anton Hillebrandt and the church was adorned with baroque decorations of Austria.

• Roman Catholicism in Romania