The Co-cathedral of Christ the King (Serbo-Croatian: Konkatedrala Krista Kralja) is a Catholic place of worship located in Krunska 23, in the city center of Belgrade, Serbia.

It is the oldest extant Catholic church in the city south of the Sava and the Danube rivers, and was built between 1924 and 1988, the cathedral of the Archdiocese of Belgrade.

The new temple, dedicated to St. Ladislaus, was solemnly consecrated by the Apostolic Nuncio Pellegrinetti December 7, 1924 and elevated to the rank of cathedral of the newly Archdiocese of Belgrade, which was the first Archbishop Ivan Rafael Rodić.

Between 1966 and 1971, a period in which Ciril Zajec was cathedral’s vicar, were expanded local parish and the presbytery was converted to the new liturgical norms dictated by the Second Vatican Council.

The façade of the church of Christ the King is divided into two sections by a horizontal cornice in stucco: the lower is the portal, supported by two Corinthian columns and topped by a lunette mosaic depicting Christ Blessing; in the upper one, there are the window with round arch and cornice supported by two shelves decorated with a pattern hanging arches.