"Кольцо Нибелунга" (The Ring of the Nibelung) is a cycle of four operas composed by Рихард Вагнер. The operas are titled Зигфрид, Валькирия, Золото Рейна, and Гибель богов. The story is based on Germanic and Norse mythology, focusing on themes of power, love, and betrayal. The narrative follows the hero Зигфрид and the cursed ring that grants its owner immense power but brings tragedy. The cycle explores the consequences of greed and the struggle between gods, heroes, and mythical creatures, ultimately leading to the downfall of the gods and the world.