Konkatedrala sv. Petra i Pavla

Osijek's Co-cathedral of St Peter and St Paul is the second cathedral church of the Archdiocese of Đakovo-Osijek. It was built at the initiative of Josip Juraj Strossmayer, bishop of what was then the Diocese of Đakovo and Srijem. In 1866 he gave the first push for the building of a new church. At that time the site of today's church was occupied by the Upper Town parish church from 1732, which had become too small and too plain next to Osijek's new buildings.

Progress was very slow until the arrival of a new parish priest, Josip Horvat. After he came, things moved faster, and in 1892 a design competition was held, won by the German architect Franz Langenberg. The old church was pulled down in 1894, and construction of today's co-cathedral began – a magnificent Neo-Gothic building with a 94-metre tower and three naves. In size it is the largest building in Croatia outside Zagreb, covering 1,062 m². The exterior was finished in 1898, and two years later Bishop Josip Juraj Strossmayer consecrated the present church.

The leading Croatian painter Mirko Rački covered the walls and ceilings with brightly coloured frescoes showing well-known episodes from the Old and New Testaments. The interior is a real treasure house of Neo-Gothic ornament, with a succession of superb altars topped by lavish stained-glass windows. The small door to the right of the main portal, through which you enter the church, is watched over by three gargoyles.

During the Croatian War of Independence the co-cathedral was hit directly by shells more than 100 times. Even so, services continued to be held in it throughout the war.