 Extraordinary are the single finds of 1890 at the Prehistoric pile dwelling settlement "Alpenquai" – the so-called "Potin lumps" whose largest weights consist of about 18,000 of used Celtic coins which date to around 100 BC.Initially prejudged just as "melt coins", the present scientific research assumes that the melting down of the lump was not completed, therefore the aim was to form cultic offerings.The site of the find was at that time around from the present Bürkliplatz plaza in the Lake Zurich.