Which major architectural achievement did Filippo Brunelleschi complete in Florence?

• A. The dome of the Florence Cathedral (Il Duomo)
• B. The Pantheon
• C. The Colosseum
• D. The Sagrada Familia

Answer: (A)

Renaissance architectural innovation is demonstrated by Filippo Brunelleschi's completion of the dome for Florence's cathedral, Santa Maria del Fiore. He solved how to crown a vast, undecorated space with a self-supporting masonry dome without the heavy, traditional center supports. His breakthrough was a double-shell design—an inner and outer dome connected by ribs—built with a herringbone brick pattern to lock the stones and reduce sliding. A special system of centering and scaffolding allowed the dome to rise without collapsing, and a lightweight structural chain around the drum helped counter outward thrust. The result was a dome of unprecedented scale and a turning point in architectural engineering, embodying the Renaissance push toward science, proportion, and human ingenuity.

These other landmarks aren’t Brunelleschi’s work in Florence: the Pantheon is an ancient Roman dome in Rome; the Colosseum is a Roman amphitheater; the Sagrada Família is a much later project in Barcelona.