It is debatable whether the Sol Invictus festival on December 25 was the source for the December date of the Christmas Holiday.
Nevertheless, coins with the image of Sol Invictus are among the most fascinating Ancient coins:
http://rg.ancients.info/constantine/Sol_other.html
http://www.forumancientcoins.com/moonmoth/reverse_sol.html
It is debatable whether the Sol Invictus festival on December 25 was the source for the December date of the Christmas Holiday.
Nevertheless, coins with the image of Sol Invictus are among the most fascinating Ancient coins:
http://rg.ancients.info/constantine/Sol_other.html
http://www.forumancientcoins.com/moonmoth/reverse_sol.html