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During his service the Diocese of Alba Iulia and Făgăraş (centred at Blaj) was removed from the jurisdiction of the Roman Catholic Archdiocese of Esztergom (in Hungary) and became an ecclesiastic province in its own right, with the Dioceses of Oradea Mare, Gherla and Lugoj as suffragans (subordinate dioceses).
In Transylvania they founded two new cities, Erszebetvaros (Elisabethstadt, Dumbrăveni) and Szamos-ujvar (Armenierstadt, Gherla), which, as a special favor, were declared free cities by Charles VI, Emperor of Austria (1711‑1740).
Wurmbrand, who passed through the penal facilities of Craiova, Gherla, the Danube – Black Sea Canal, Văcăreşti, Malmaison, Cluj, and ultimately Jilava, spent three years in solitary confinement.
In 1924, Pope Pius IX gave the church to the Greek-Catholic Church to serve as the cathedral of the Cluj-Gherla Eparchy.