Triglav is a unity of three gods. The exact members of the trinity vary by place and time. Earlier Triglav included Svarog, Perun, and Dajbog. Later Dajbog was replaced by Svetovid or by Veles. Triglav is usually described as a fusion of these gods. More rarely he is their son. Triglav may also be a unity of lesser gods (Lesser Triglav). Usually each member of Triglav is a ruler of a single realm, such as heaven or underworld.
In one of the legends Triglav is veiled completely, so holy that he cannot see the evil deeds of men. He rarely appears around mortals.
Triglav is depicted as a three-headed man sometimes with bands of (gold) blindfolds over his eyes, or a man with three goat heads. Several Triglav temples existed near Szczecin. During the Christianization the temples and statues of Triglav were destroyed.
Two gods, Perun and Veles/Volos, are mentioned in the text of the early 10th century peace treaties between pagan rulers of East Slavs and Byzantine Emperors.
Gods such as Koleda and Kupala were constructed from misinterpreted names of popular Slavic folk festivals; Koledo was the Slavic name for Christmas processions of carol singers, whilst the source of the name Kupala is unknown.
The world of gods and mortals was situated in the centre of the earth (considered to be flat, of course), encircled by a sea, across which lay the land of dead, where birds would fly to every winter and return from in spring.