Heimdall is a mysterious deity of Norse mythology whose main attribute refers to guarding the realm of the gods, Asgard, from his high fortress called Himinbjörg found at the top of Bifröst, the rainbow bridge. He has the might of sea and earth, very keen eyesight, always on the lookout for danger, and when intruders are approaching, he sounds his Gjallarhorn, the resounding horn. This horn will announce the beginning of Ragnarök, the apocalypse that will have Heimdall battling Loki, one of the leaders of giants. Furthermore, some fragments of Norse poetry describe Heimdall as the father of all mankind.
This is a companion discussion topic for the original content at https://www.worldhistory.org/heimdall/.