I Middelalderen hang juletreet opp-ned!! Trekanten symboliserte Tre-enigheten! http://ow.ly/3pxcZ In Middle Age X-mas tree hang upside-down! Probably a munk in North-Germany who first introduced this symbol (the Holy Trinity) into people’s homes. Many places in Central Europe it became a custom to hang the tree from the ceiling, and also to decorate it with paper-roses, nuts and sweets that kids ate on the 13th Day.