Hill above p. Gums, which in X. was built by ancient fortress, which later became the capital of Novgorod-Seversky Principality. Wooden fort with earthen ramparts with the XII century. was the residence of the dynasty, descendants of Oleg, defending the eastern borders of Kievan Rus. Entry was through one gate, inside was the prince's court and a stone cathedral of Archangel Michael. On three sides are covered Detinec roundabout city, where was erected Nicholas Church (now in its place a wooden church of the same name in 1762). . In the second half. XIV century castle passed into the hands of Lithuanian princes, in 1503, went to Muscovy, and then to Poland, until it was conquered B. Khmelnitsky. In 1708 the fort was occupied by Peter I, is strengthened, but soon lost its importance and was razed. At the site of the princely Detinets a monument to the legendary Boyan - author of "Lay" and the memorial stone.