The square where the church is situated is younger than the inner town. The markets were transferred here from the inner town in the 19th century. The square developed its present form when the Church of Jesus’ Heart was built in 1894. Ludwig Schöne designed the parish church. His plane started to be carried out in 1892 in the place of the former Korona Hotel. From the 57-m high bell tower of the church, which defines Kőszeg’s appearance, a section of Händel’s opera, Saul can be heard. The church with its captivating dimension – 49x19x17 metres – is one of the largest buildings in the town even today.
The church’s appearance reflects the outstanding skills of the Austrian church-builders and Hungarian handicraftsmen of the 19th century. The three-aisled interior has a broken transept and the sanctuary. The captivating painting of the ceiling, walls and pillars is the work by Otto Kott, an artist from Austria. Due to the East-West orientation of the church, the coloured stained glass windows are especially fascinating in the afternoon. The Royal Saints of Árpád-dynasty– Blessed Gisella, St. Elizabeth, St. Margaret, St. Stephen, St. Imre, St. Ladislas and figures of Jesus’s Heart mystery, the Holy Virgin and St. Joseph can be seen on the windows. The front windows of the side aisles are decorated with New Testament scenes and lifescenes of the saints chosen by the founders. The organ of the church was built in the workshop of the famous Rieger-brothers in 1894. Outstanding Tirolian and Viennar craftsmen in Austria made the carved altars.