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A masterpiece of Roman Baroque architecture, St. Ivo alla Sapienza, designed by Borromini, was begun under the pontificate of Urban VIII in 1643. The drum of the dome is surmounted by a graded convex segment that counter-balances the concave hemicycle of the extant courtyard designed by della Porta a century earlier. The concave lantern, pictured here, topped by a spiral ramp terminates in a flaming laurel wreath (symbol of wisdom and knowledge = sapienza) is encrusted with the heraldic iconography of the Pamphilj Pope, Innocent X who succeeded Urban VIII in 1644.
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