Valknut
The Valknut is a symbol of Norse mythology depicting three interlocking triangles.
In reality, the name "Valknut" is a relatively recent word creation from Norway, meaning "knot of the occis" or "knot of the slain warriors".
The Viking symbol it represents, on the other hand, dates back to antiquity and refers to the pagan cult of the dead.
Most often, historians find the Viking Triangle engraved on runestones or tombstones next to Odin or sacred Viking animals.