Rare Celtic gold coins found in Swiss bog may reveal ancient ritual offerings Two extremely rare Celtic gold coins that were found in a woodland near Arisdorf in northwestern Switzerland are providing new information about the early phases of coinage in the area and ritual practices dating back more than 2,000 years. The gold coins were found in a follow-up survey and date back to around the middle and second half of the 3rd century BCE, making them among the oldest known Celtic coins found in Switzerland...