St. Nicholas Cathedral
Кафедральный собор св. Николая, Katedrala sv. Nikole
Location	Ruski Krstur
Country	Serbia
Denomination	Catholic Church (Greek Catholic Church of Croatia and Serbia)
Administration
Diocese	Ruski Krstur

The Cathedral of Saint Nicholas^[1] (Serbian: Кафедральный собор св. Николая, Katedrala sv. Nikole), also called Ruski Krstur Cathedral, is a Catholic cathedral in the town of Ruski Krstur, Kula, Serbia.^[2]

The church follows the Byzantine Rite and serves as the cathedral of the Greek Catholic Eparchy of Ruski Krstur, previously the Exarchatus Apostolicus Serbiae (Гркокатолички апостолски егзархат у Србији). The church was elevated in cathedral on August 28, 2003, simultaneously with the creation of the Apostolic Exarchate for Catholics of Byzantine rite of Serbia under the pontificate of Pope John Paul II.

The present building was built in 1784 but underwent a reconstruction in 1836, as evidenced by the inscription on the north portal. Between 1961 and 1963 there was the complete restoration of the iconostasis. Some restoration works were carried out in 1972.