It is thought that Boris and Gleb Cathedral was founded in 1120, Chernigov Prince David, the grandson of Yaroslav the Wise as the main church of the monastery and so named in honor of the first Russian saints - Boris and Gleb (middle name is David Duke was Hleb). After his death, David-Gleb Svyatoslavovych was buried in Borisoglebsky cathedral and was the first resident of Chernigov is classified for his pious life among the saints. The structure resembles cathedral monastery church late 11th century. Kiev (Cathedral of the Assumption Cave Monastery and St. Michael's Cathedral). Of the later temples are very close to Kiev Cyril's Church, built Chernigov masters, the v1150, and the Assumption Cathedral in Volodimere-Volhynia in 1160 This is a cross-domed shestistolpny temple with three naves and a bath. The temple was built as a princely tomb, on the northern and southern walls are constructed arkasoli for burials. Burial may be doing the same in the galleries, annexes (not preserved), and under the floor of the cathedral. Somewhere buried here son of the founder of the cathedral Izyaslav Davidovich. Also here were buried Lazarus Baranovich and Theodosius Uglich, whose relics were later transferred to the Saviour Cathedral. During its long history the cathedral was destroyed several times, burned, rebuilt. In the years 1627-1659. there was a Dominican church, and in Soviet times skladsolenyh vegetables. During the Great Patriotic War, the cathedral suffered and was restored in its present form. During restoration in 1948 were found architectural details of the cathedral - two carved capitals and the cornerstone of the portal. These findings are unique because, nowhere else in the territory of Ukraine of such findings was not. Using facades parts of the limestone, decorated with relief ornaments so-called "animalstyle", which goes back to pagan times. In the animal style floral designs combine a fabulous wreath with fantastic birds, beasts, griffins. This style is characteristic of just 12 in Chernigov architecture. Now the cathedral is part of the Chernihiv Historical and Architectural Reserve. Here is the famous carving of the capital with a picture of "Chernihivbeast", which some researchers relate to the Iranian deity Semargl. There is also a masterpiece of the jeweler's art - 56 kilogram silver gilt royal doors, made from found in 1700 silver pagan idol.