The church of St. John the Baptist in Nisko was once an old Christian basilica. It has been explored and the findings have been preserved in the collection of a monastery in Sinj. In the 18th century a small church was built and all that has remained to this day is the foundation on the cemetery and a kind of a tombstone (“stećak” in Croatian) with a decoration that served as an altar. A silver crucifix that is used in processions (from the 18th century) and a copper “ghastly” crucifix (also from the 18th century) are from the church to boot.
A new church, a simple one with an apse, was constructed in 1912. It was renovated in 1935 and in 1962, while in 2000 the renovation was quite detailed: a concrete isolation was added, the roof was changed, and the interior was redecorated. On the façade there is a bell gable with three bells. The interior of the church was decorated by JulijeŠvabe in 1935. He painted St. Cyril and St. Methodius on the triumphal arch and on a wooden ceiling, which does not exist today, St. John the Baptist and four evangelists. The same artist built a large plaster altar. There is an altar of Madonna of Carmel in the boat. Also, there is air conditioning in the church, and it is illuminated with four spotlights.