"Grossmünster: Zurich's Twin Towers According to legend, Zurich’s most iconic landmark was commissioned by Charlemagne. While Fraumünster, across the Limmat, draws onlookers with its stained-glass windows by Chagall, Grossmünster recently acquired destination-worthy art of its own: German artist Sigmar Polke’s beautiful, kaleidoscopic motifs featuring Old Testament figures, installed in 2009. Photo © Christian Beutler/Zürich Tourismus."