Santa Maria della Pieve: 12th-century church is Lombard Romanesque architecture at its most beautiful, with a craggy, eroded facade of stacked arcades in luminous beige stone. The spaces between the columns of the arcades get narrower at each level, which, along with the setting on a narrow street, only adds to the illusion of great height. On the high altar above the raised crypt is a 1320 polyptych of the Madonna and Child with Saints -- all wearing gorgeously worked fabrics -- by Sienese master Pietro Lorenzetti.
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