 
 <prompt> Wetin be di main purpose of di Schanze? Based on di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: The city waka go the west of the boundaries of the peninsula wey River Aare form. The Zytglogge tower show the western boundary of the city from 1191 reach 1256, when the Käfigturm come take over until 1345. E come pass give the Christoffelturm (wey dey close to where dem build the modern-day railway station) until 1622. During the time wey the Thirty Years' War dey happen, two new fortifications – the big and small Schanze (entrenchment) – dem build to protect the whole area of the peninsula. 