saw loads of "Galette des rois". They are the sweets for
Epiphany in France.
http://ja.wikipedia.org/wiki/%E5%85%AC%E7%8F%BE%E7%A5%AD
People celebrate Christ's birth and appreciate what the three kings visit and meet him.
Kouglof molds have wave patterns. They represents the mountains and caves where three wisemen tracked.
"des" means prural form and does "rois" kings, namingly "rois mages" means three wisemen from the East.