The courtyard setting for a university chapelThis small church is located at the east end of a long cortile; the main entrance is at the far end of Giacomo della Porta's courtyard. See plan of the whole. |
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The concave lower facadeThe facade echoes the two-tier arcades of the adjoining loggias, except in the church exterior the arcades are blind. No fan of right angles, Borromini has designed a curved, concave facade. | ||
The drum encasing the domeThe lower concave facade is countered by the hexagonal drum above which projects in convex curves, divided into three bays, the central one occupied with a long window. Pilasters emphasize the divisions. |
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Above the drum there is a kind of stepped pyramid with emphatic, buttress-like ribs. The lantern above has double columns with concave areas between the columns (a reverse of the drum below. The lantern ends in a dramatic spiral with a flaming laurel wreathe at the summit--a symbol of wisdom or "sapienza." The corners of the arc have in three dimensions the heraldic symbol of Pope Alexander VII--the six mountains topped by a star. (See the interior as well for this visual symbolism.) | ||
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