St. Nicholas Church is one of the oldest Orthodox churches in Yessentuki. Its construction began simultaneously with the appearance of the Cossack stanitsa of Yessentukskaya. The wooden church, built in 1826 in the shape of a cross with an adjoining high bell tower, was designed by the Italian architects — brothers Bernardacci. An almshouse and a parochial school were attached to St. Nicholas Church. Later, a stone wall was raised around, which eventually became a military fortification. Residents of the village sheltered themselves behind it during the enemy raids: the peal of bells, which warned of danger, could be heard throughout the area.
In the late XIX century, with the growth of the stanitsa of Yessentukskaya, St. Nicholas Church was rebuilt, with expansion of the inner space. Also, the plank roof was replaced by the iron one and a new iconostasis was installed. The temple as such has survived to our time. Particle of the relics of Sergius of Radonezh is currently kept in the bright blue wooden temple. The church is functional and regularly conducts divine services.