Kitezh is a legendary city in Russian folklore, often described as a mystical place that became invisible to protect its inhabitants from invaders. According to the legend, the city was founded by the Prince of Kitezh and is said to be located near Lake Svetloyar in the Nizhny Novgorod region. The tale of Kitezh is closely associated with themes of spirituality and the triumph of good over evil. It is famously depicted in the opera "Kitezh and the Maiden Fevroniya" by composer Nikolai Rimsky-Korsakov, which tells the story of the city's defense against the Mongol invasion.