The dazzling white marble of Pisa's Duomo and leaning campanile is most breathtaking in the noonday sun, but late afternoon is the blessed moment for the brilliant mosaic facade of Orvieto's cathedral.
Orvieto's cathedral was built on the command of pope Gregory I.
mnli hypothesis: Orvieto's cathedral was built on the command of pope Gregory I. premise: The dazzling white marble of Pisa's Duomo and leaning campanile is most breathtaking in the noonday sun, but late afternoon is the blessed moment for the brilliant mosaic facade of Orvieto's cathedral.