Brunelleschi's Dome is the dome of the Florence Cathedral, officially known as Santa Maria del Fiore. Designed by architect Filippo Brunelleschi, it was completed in 1436 and remains an architectural marvel. The dome is notable for its innovative use of a double-shell structure, which reduces weight while maintaining strength. The construction of Brunelleschi's Dome was a significant achievement during the Renaissance period. It spans 42 meters in diameter and was the largest dome in the world at the time. The dome's design influenced future architecture and showcased the advancements in engineering and artistic expression of the era.