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 ) .
Identical to the austere Gothic exterior , Cambio added frescoes to the courtyard .