On this day, in 1337, was born....

On this day, in 1337, was born Wenceslaus I, Duke of Luxembourg.

The arms of Luxembourg are

Escutcheon Barry of ten Argent and Azure, a Lion rampant queue forchée Gules crowned, armed and langued Or.
Supporters Two lions reguardant queue forchée crowned Or, armed and langued Gules
Orders Order of the Oak Crown
Other elements The whole resting on a Mantle Gules lined Ermine, fringed and tasseled Or, summoned to the Grand-Ducal Crown

https://commons.wikimedia.org/wiki/File:Coat_of_arms_of_Luxembourg.svg#/media/File:Coat_of_arms_of_Luxembourg.svg

File:Coat of arms of Luxembourg.svg - Wikimedia Commons