Ouroboros

Ouroboros (ancient Greek οὐροβόρος from οὐρά “tail” + βορά “food, food”) is a snake or dragon curled up in a ring, biting its own tail. It is one of the oldest symbols[1][2][3] known to mankind, the exact origin of which - the historical period and a particular culture - cannot be established[4]. This symbol has many different meanings. The most common interpretation describes it as a representation of eternity and infinity, in particular the cyclical nature of life: the alternation of creation and destruction, life and death, constant rebirth and death. The Ouroboros symbol has a rich history of use in religion, magic, alchemy, mythology, and psychology[3]. One of its analogues is the swastika - both of these ancient symbols mean the movement of the cosmos [5].