Church of Saints Constantine and Helena - a Greek Orthodox church located in the town of Balchik. The building was built in 1894. It is known that in those years in Balchik was only two churches: Bulgarian, named in honor of St. Nicholas, and the Greek, called "Epiphany."

Church of Saints Constantine and Helen is a two-story nave basilica with traditional Bulgarian church architecture element - apse. The roof of the temple is not crowned with a dome. Its main advantage is the exterior design - a large number of fine stone pieces that adorn the belfry open type, located on the roof.

As a result of government policies in 1906, many Greeks left the territory of Bulgaria. Perhaps this was the reason that in the Church of Saints Constantine and Helen have ceased to hold services. During the Romanian occupation and after the temple was used for other purposes. Until recently, the building functioned as a concert hall. Only closer to the present day church was finally put in order and re-consecrated. Today it is a functioning temple.