premise: In gentle contrast to the austere Italian Gothic exterior of the Palazzo Vecchio by Arnolfo di Cambio (architect of the Duomo), Vasari added ornate stucco and frescoes to the first inner courtyard for a Medici wedding in the 1560s (the palazzo served briefly as a Medici residence until they moved across the river to the Palazzo Pitti).
hypothesis: Identical to the austere Gothic exterior, Cambio added frescoes to the courtyard.