Initially, several wooden structures were located at the site of the Florish Monastery, including the first church built in 1651 by Elder Methodius with monks Varlaam and Makarii with the support of benefactors. After the church was built, Methodius went to Moscow to the Patriarch Joseph to receive a blessing for the consecration of the new temple in honor of the Assumption of the Blessed Virgin Mary, with an altar dedicated to St. Ephraim the Syrian. The Patriarch approved the initiative and in 1651 issued a decree for the consecration of the church. On his way back, Methodius visited the Vyaznikovsky Annunciation Monastery and asked the abbot Moses to consecrate the new church. The church was soon consecrated, but there was no one to serve in it, as Methodius, Varlaam, and Makarii were simple monks. Due to the reforms of Patriarch Nikon, which caused discontent among the adherents of the old customs, Hierodeacon Hilarion arrived at the Florish Monastery. After being ordained as a hieromonk on May 22, 1654, he intensified his spiritual endeavors in the monastery.

Hilarion's strict life soon became known in the area, and the number of monks in the monastery began to grow. However, the Assumption Church soon burned down, and it was necessary to build a new temple and erect a fence for protection against wild animals and ill-wishers. Hilarion and the brethren were saddened by this loss. In his prayers, Hilarion asked God for help, and in a dream, Jesus Christ appeared to him, promising that everything planned would come to pass. Soon, people came to the monastery, held a prayer service, and made a significant contribution sufficient for the construction of the fence and church. Then carpenters arrived, who built a new, larger temple, a fence, and a wooden church at the gates in honor of Saints Zosima and Savvatiy. By 1657, the new Assumption Church could no longer accommodate all those wishing to pray. In 1660, Hilarion appealed to Tsar Alexei Mikhailovich for permission to dismantle the old church and build a new one in its place with an altar in honor of the Life-Giving Trinity. Metropolitan Pitirim of Saransk and Podon blessed the construction of the new church, and in 1661, the temple was consecrated in honor of the Assumption of the Mother of God with an altar of the Holy Trinity. Sources noted that the church was bright, large, and tall, with a porch for the joy of all who entered. During the construction, the Mother of God appeared to Hilarion and promised that the monastery would not be in need.

The church was rebuilt in 1787-1793. On April 1, 1923, the monastery was closed, and a commune for minors was organized here. Valuable items were taken to Vladimir, and the rest was looted. The premises of the former monastery were used for housing workers and accommodating timber harvesting offices. The Assumption Cathedral was turned into a granary, and the Trinity Church became a club for workers. In 1930, a military unit was stationed in the monastery, which used the building of the Assumption Cathedral until the early 1990s. Only in the summer of 2008 did the investigation of the foundation of the Assumption Cathedral show its good condition. The foundation was reinforced, the walls, vaults, and internal partitions were repaired, a roof was constructed, the floor was insulated, and windows were installed. The restoration of this valuable architectural monument lasted 10 years. On July 26, 2018, Metropolitan Georgiy of Nizhny Novgorod and Arzamas consecrated the main cathedral in honor of the Assumption of the Blessed Virgin Mary.