 Due to its location on Lake Zurich lake shore at the effluence of the Limmat, where the goods had to be reloaded onto riverboats, and although Turicum was not situated alongside an important Roman main road, however, the water route was essential for the Roman army in the present Western and Northeastern Switzerland.Not yet archaeologically proven but suggested by the historians, the very first construction of the present Münsterbrücke Limmat crossing was built in the Roman era, when the present Weinplatz square was the former civilian harbour of the Celtic-Roman "Turicum", and so the term "Weinplatz" (literally "wine plaza") has an ancient meaning.As a "Vicus", Turicum was not secured by town walls, but the buildings grouped around the customs station ("Quadragesima Galliarum") where the clearance of goods and travelers prior to transfer between the provinces of "Gallia Belgica" and "Raetia" took place, mainly on the water route (from and to the Roman heartland over the mountain passes of the Swiss Alps) Walensee-Obersee-Zürichsee passing "Centum Prata" (Kempraten) towards the Limmat, Aare and Rhine.