Celtic coins, which are mixed with charcoal remnants. Some of the 18,000 coins originate from the Eastern Gaul, others are of the Zürich type, that were assigned to the local Helvetii, which date to around 100 BC. There's also an island sanctuary of the Helvetii in connection with the settlement at the preceding Oppidi Uetliberg on the former Grosser Hafner island. at the Sechseläutenplatz on the effluence of the Limmat on Lake Zürich lake shore. A female who died in about 200 BC found buried in a carved tree trunk during a construction project at the Kern school complex in March 2017 in Aussersihl. Archaeologists revealed that she was approximately 40 years old when she died and likely carried out little physical labor when she was alive. A sheepskin coat, a belt chain, a fancy wool dress, a scarf and a pendant made of glass and amber beads were also discovered with the woman. The Roman Vicus Turicum first belonged to the province of Gallia Belgica, and to Germania superior from AD 90. Following Constantine's reform of the Empire in 318, the border between the praetorian prefectures of Gaul and Italy was just east of Turicum crossing the Linth between Lake Zürich and Walensee. Roman Turicum was not fortified, but there was a small garrison at the tax-collecting point, set up not exactly on the border, but downstream of Lake Zürich, where the goods entering Gaul were loaded onto larger ships. South of the castle, at the location of the St. Peter church, there was a temple to Jupiter. The earliest record of the town's name is preserved on a 2nd-century tombstone found in the 18th century on Lindenhof, referring to the Roman castle as "STA(tio) TUR(i)CEN(sis)". The area was Christianised along with the rest of the Roman Empire, during the 4th century. According to legend, saints Felix and Regula were executed at the location of the Wasserkirche in 286. The Alamanni settled in the Swiss plateau from the 5th century, but the Roman castle persisted into the 7th century. The earliest manuscript mention of the settlement, as castellum turegum, describes the mission of Columban in 610. An 8th-century list of toponyms from Ravenna mentions Ziurichi. There is a legendary account of an Alamannic duke Uotila residing on, and giving his name to, the Uetliberg. Holy Roman Empire Zürich was part of Frankish-ruled Alemannia from 746, following the blood court