The Densuș Church (also known as St Nicholas' Church) in the village of Densuș, Hunedoara County, Romania is one of the oldest Romanian churches still standing.
It was built in the 7th century with additions made in the 13th century on the site of a 2nd-century Roman temple, with some materials from the Dacian Sarmizegetusa fortress. It has a stone tower above the naos. Inside the church there are 15th century mural paintings that show Jesus wearing Romanian traditional clothes.
It is considered that on the setting of the present day church, there was once a Dacian temple dedicated to Zamolxis, upon which the conquering Romans built a temple dedicated to the god Mars. After the Roman administrative withdrawal, the temple became a Christian church, and sermons were held there. Its present form dates from the beginning of the 12th century. Considering its tradition, it dates from the 4th century AD, and is considered the oldest church in Romania and South East Europe.(Wikipedia)