Osijek Cathedral, or the Osijek Co-Cathedral, is a neo-Gothic church that adorns the heart of the city and the main Osijek square. If you have rented an apartment, room or holiday house in Osijek, you will easily notice this magnificent building whose towers reach a height of 94 meters. The Osijek Co-Cathedral of Saints Peter and Paul is the tallest sacred building in Croatia after the Zagreb earthquake in which the towers of the Zagreb Cathedral were destroyed. With its 1,062 square meters, Osijek Cathedral is a masterpiece of the architect Franz Langenberg. The construction of it began in 1894 and completed in 1900. It was built on the initiative of the famous bishop of the Đakovo and Srijem Diocese, Josip Juraj Strossmayer. The interior itself was improved several decades after its construction, so it is considered completed in 1942, when the Croatian painter Mirko Rački painted the walls with frescoes. Holy masses are held here several times a day, and the entrance is free for everyone who wants to see the abundance of neogotic ornaments, a series of altars and colourful stained glass windows.