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Baptistery of San Giovanni_MAX3816_1.JPG
The parish church of San Giovanni Battista, flanked by the impressive staircase that climbs up to Piazza Jacopo delle Quercia and the remains of the so-called "Duomo Nuovo", was built below the Cathedral of Siena, almost a sort of ‘crypt', perhaps by master-builder Camaino di Crescentino between the second and third decades of the XIV century. The rectangular-plan Church is divided into a nave and two aisles, each of which is formed by two spans with groin vaults. The frescos that completely decorate the magnificent vaults represent the most extensive and articulated religious cycle of the Sienese Renaissance.