The church of Steni is dedicated to Agios Tryfonas that according to tradition is the protector of the animals and crops and came from the Lampsako of Minor Asia. The temple has been built in 1913 at the place where the first church of village was found, a small building which was destroyed by fire because of some forgotten candles.
During the construction of the existing temple, all the residents offered voluntary work, some of them carrying stones with their animals from the region of the Monastery of Chrysolakournas and others by proving help to the craftsmen that built the church.
The belfry which is one of the more beautiful of the region is entirely built from hewer hard stone of the region, it was built in 1940 by the famous craftsman of that season, Constantinos Zoppos and his son Demos from the village of Geroskipou.
Before the construction of the belfry, as a "belfry" it was used a "tremithas", a tree outside the entry of the temple where a bell was tied up. Near this tree it existed a big stone which the Metropolitan was using in order to ride his "Moula" (female horse), after the Divine operation at the church was finished.
The money for the construction of the belfry had been gathered by contributions of immigrant people form Steni in South Africa that had been sent to the village for this reason.
The temple has been reconditioned in 1961 and in 1988 and every year on 1st of February, day of feast of Agios Tryfonas, local people and residents of other villages honor with their presence the memory of Agios Tryfonas. Today the priest of the temple is Mr Josif Christodoulou Vodommatis.