Beliefs and religious practices of the ancient Slavic peoples of East Europe, including the Russians, Ukrainians, Poles, Czechs, Slovaks, Serbs, Croats, and Slovenes.
Most Slavic mythologies hold that God ordered the devil to bring up a handful of sand from the bottom of the sea and created the land from it. Slavic religion was often characterized by dualism , with a Black God named in curses and a White God invoked to obtain protection or mercy. Lightning and fire gods were also common. The ancient Russians appear to have erected their idols outdoors, but the Baltic Slavs built temples and enclosed sacred places, where festivals were held and animal and human sacrifices occurred. Such festivals also often included communal banquets at which the flesh of sacrificial animals was consumed.