St. Theresa Cathedral was built in the mid-18^th century and is based on the Latin cross with pronounced vertical lines, and its exterior, with its tall slim bell tower, and interior radiate elegance and harmony of late baroque architecture. Special credit for its construction should be given to Franjo Thauzy, the Bishop of Zagreb, while Empress Maria Theresa granted authorization for construction and provided the construction project. The construction began in 1756, and it was finally decorated and consecrated in 1763.

The church was built in Viennese baroque fashion, cross-shaped, and its architect is still unknown. The interior was designed in late baroque fashion, i.e. rococo. Its interior walls were painted by artists Celestin Medović and Oton Iveković. With Pope John Paul II founding the Požega Diocese on 5^th July 1997 the church was promoted to the title of cathedral, thus becoming the mother church of western and central Slavonia. The church was thouroughly renovated and adapted for cathedral celebrations in 2007. Among other things, a new stone altar was set up, new bells and a new organ were purchased and a crypt was decorated and consecrated by the bishop of Požega, Antun Škvorčević. In 2013 in the crypt of the Požega Cathedral, the Chapel of St. Pope John Paul II was consecrated and opened, where the statue of Pope John Paul II, the founder of the Požega Diocese, can also be seen. In the chapel there is a bronze statue of the Pope, a bronze relief of Resurrection of Jesus, a stone relief of Our Lady, the mosaic “Night in space”, all of the above being works of Marija Ujević Galetović. Apart from that, there are works of other Croatian artists in the crypt. In the oratory above the right cathedral sacristy there is the Treasury of the Požega Cathedral which stores liturgical items of great cultural and historical value (15^th – 21^st century).

The interior is decorated in the fashion of late Baroque or Rococo style. The main altar made of stucco-marble and the side wooden alters, as well as the pulpit and the confessionals, together with the sacristy furniture originate from the church’s construction time (18^th century). Famous Croatian artists, Celestin Mate Medović and Oton Iveković painted the church in frescoes in 1899. Scientifically proven information about the Cathedral of Požega can be found in the book “The Cathedral of Požega” printed in 2022 or, more briefly, in the book “The Cathedral of St. Theresa in Požega” by Antun Škvorčević, printed in 2023 in English and Croatian.