Zuerich (German: Zuerich French: Zurich, Italian: Zurigo in English generally is the largest city in Switzerland and the capital of the canton of Zuerich. The city is Switzerland’s main commercial and cultural centre and sometimes called the Cultural Capital of Switzerland, the political capital of Switzerland being Berne. Zuerich can be counted as one of the world's pre-eminent global cities. According to several surveys from 2006 to 2008, Zuerich was named the city with the best quality of life in the world as well as the wealthiest city in Europe. The earliest known form of the city's name is Turicum, attested on a tombstone of the late 2nd century AD in the form STA(tio) TURICEN(sis) (Turicum tax post). Neither the name's linguistic origin (most likely Rhaetic or Celtic) nor its meaning can be determined with certainty. A possibility is derivation from *Turuecon, from the Gaulish personal name Tueros. A first development towards its later, Germanic form is attested as early as the 6th century AD with the form Ziurichi. From the 10th century onward, the name has more or less clearly been established as Zuerich (Zurih (857), Zurich (924)). Note that in the modern Zuerich dialect, the name has lost its final. This is hypocoristic rather than the result of a regular sound change, and the adjective remains Zuercher also in dialect.