The most ancient building in the Murom region, not counting the 17th century temple buildings in Murom itself.
The first chronicle information about the Borisoglebsky Monastery dates back to 1345. The chronicles tell of the death of Prince Vasily Yaroslavich at the end of winter and his burial in Murom. The Nikon Chronicle specifies: "... in the monastery on Ushna". This is quite acceptable, since Murom then "lay empty", and only in 1351 did Prince Yuri begin its restoration. The earliest historical document of the Borisoglebsky Monastery dates back to 1506.
Based on the census books of the first quarter of the 17th century, one can imagine what the Borisoglebsky Monastery looked like during its period of prosperity. It housed two wooden churches of Saints Boris and Gleb and Saints Florus and Laurus. The outbuildings included a bakery, a cookhouse, a cellar, an icehouse, a drying room, and seventeen monastic cells. In the late 1670s, during the reign of Archimandrite Abraham, it was decided to build a new stone cathedral church of the Ascension. In the 1680s, a second stone church, the Rozhdestvensky Church, was erected next to the Ascension Cathedral. The architectural ensemble was completed by the St. Nicholas Church, built in 1699 by Matvey Dorofeev. Only the two-story, five-domed Rozhdestvensky Church has survived to this day. A tented bell tower adjoins it on the western side. Until recently, seven large gravestones with inscriptions in Slavic script lay near the Ascension Church. The earliest was from 1584, the latest from 1659. It was the necropolis of the ancient Borisov family, the monastery's founders.