The Basilica di Santa Maria del Fiore or Florence Cathedral is the cathedral church of Florence , Italy . The basilica was designed by Arnolfo di Cambio with the dome by Filippo Brunelleschi . The Basilica di Santa Maria del Fiore is the cathedral church ( Duomo ) of Florence , Italy , begun in 1296 in the Gothic style to the design of Arnolfo di Cambio and completed structurally in 1436 with the dome engineered by Filippo Brunelleschi .