Grossmünster Cathedral, with its two binocular towers, is a Zurich icon. Legend has it that the first Carolingian version of the building, which is located in the Old Town, on the right bank of the Limmat, was commissioned by Charlemagne, whose statue you can take a look at in the Romanesque crypt. The present building dates from 1220.
The interior is very simple, but the organ is considered the finest in Switzerland, and the agate windows by Sigmar Polke are definitely worth a look. The cathedral's key asset, however, is the view that awaits you from the top.
Be forewarned, however, that to reach the most beautiful panoramic view of Zurich means climbing the 187 steps of the spiral staircase in the south tower, the Karlsturm (aka the Charlemagne Tower).
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