THE DOME OF SANTA MARIA DEL FIORE
- Seda DOGAN DEMIREL
- 7 hours ago
- 4 min read
Date: 1420-1436
Artist: Filippo Brunelleschi
Art Movement/Period: Italian Renaissance
Exhibited at: Florence, Italy
Everything About the Florence Cathedral Dome: Architecture, History, and Symbolism
The people of Florence celebrate the anniversary of the dome of their city cathedral, Santa Maria del Fiore, every year. But why would a city celebrate the anniversary of a dome?
The construction of the Florence Cathedral, with its red dome visible even from the distant hills of Tuscany, began in the late 13th century and took nearly two hundred years to complete. On one hand, the cathedral symbolizes Florence's political dominance over other Tuscan cities, while on the other, it serves as a testament to its immense wealth. It is believed that different sections of the church represent various parts of Florentine society.
According to art historian Howard Saalman, the octagonal central part of the church represents the Florentine Republic. Meanwhile, its "arms" or the three apses represent the Church (East), the Guelfs (South), and the guilds (North) that transformed Florence into a perfect merchant city.
While the construction of the cathedral continued in Florence, the apse tribune was completed in 1367, staying true to the original design by Arnolfo di Cambio (approx. 1245–1310). However, the real problem began after this stage. In 1413, when a massive 13-meter-high octagonal drum (tambour) was built over the apse, the engineering of the roof to be placed on top became incredibly complex. This massive gap, where traditional methods were insufficient, brought along great debates regarding the future of the cathedral.
In 1418, the Opera di Santa Maria del Fiore announced a competition for the design of the dome. This was an extremely challenging task. It required a structure that would not only harmonize with the rest of the building but also overcome the immense practical and engineering obstacles that would arise. The competition, which involved eighteen architects and seventeen different proposals, concluded in the spring of 1420.
In the Footsteps of Ancient Rome: Brunelleschi’s Genius Inspired by the Pantheon
Thus, the story of the Dome of Santa Maria del Fiore in Florence—one of the greatest masterpieces in human history—began on August 7, 1420. Filippo Brunelleschi and Lorenzo Ghiberti were appointed as the Provveditori (Supervisors) of the Dome on April 16, 1420. They were joined by a third supervisor, Battista di Franco, who served as the site manager and was officially considered equal to his two colleagues. However, from 1425 onwards, the construction site came entirely under Brunelleschi's control.
Brunelleschi taught himself architecture during long trips to Rome with Donatello. There, he studied classical temples and the dome of the Pantheon. His belief that it was possible to build a self-supporting dome emerged during these study trips.
The cathedral dome is the world’s largest masonry dome, with an inner diameter of 45.5 meters and an outer diameter of 54.8 meters. Therefore, it required a completely new approach to architecture. During construction, new machines and innovative methods were utilized. When looking at the dome from the inside, a massive open space with no central support is visible. From the outside, however, what we see is actually a different structure. Brunelleschi designed it as a "double shell." Most of the structural work is supported by the inner shell, which is much thicker than the outer shell. There is a gap between these two layers, and the bricks were laid in a "herringbone" pattern to ensure stability as the dome rose.
Brunelleschi also added railings to the scaffolding and created openings to protect the site from the wind. His emphasis on site discipline and the lighting measures he took for worker safety were remarkable. Furthermore, he designed magnificent machines such as cranes, pulleys, and rotating hoists suspended in mid-air. These machines were so ingenious that the young Leonardo da Vinci admired and sketched them in his notebooks when he arrived in Florence.
A Symbol of Transition from Gothic to Renaissance: Brunelleschi and the Double-Shell Dome
The dome is not perfectly circular but octagonal, featuring a pointed shape that resembles Gothic architecture. The cathedral as a whole was constructed in the late medieval Tuscan-Romanesque style. While the base of the structure is a beautiful Gothic cathedral, as it rises, Brunelleschi’s interest in the classical tradition becomes evident. It moves away from pure Gothic and transitions into the style we define today as the Renaissance.
When people think of Gothic architecture, they usually imagine French cathedrals surrounded by massive stained-glass windows and "flying buttresses" that allow light to enter. However, Gothic architecture in Italy is different. The style seen in this cathedral is Tuscan Gothic. It is built of brick but covered with various colored marbles, featuring beautiful geometric designs and patterns that add movement to the building's surface. This use of different colored stones, known as "polychromy," is reminiscent of ancient Roman architecture.
Nevertheless, some Gothic signs familiar from French and English cathedrals can still be seen, such as long, narrow "lancet" windows and small rose windows. All of these are part of the "International Gothic" style. During that period, Florence viewed itself as the "New Rome," so these references to ancient Rome were expected.
The people of Florence were deeply impressed by Brunelleschi’s ability to build a massive octagonal brick dome without any internal support system. Therefore, the anniversary celebrations of the Santa Maria del Fiore dome are a ritual of collective memory, renewing Florence’s "New Rome" ideal and its civic pride every year.
References:
Brunelleschi and the Dome of Florence: How to Make a City Proud, Leanne Jansen, leidenartsinsocietyblog
Julia Fiore, Decoding the Symbolism in Hans Holbein’s “Ambassadors”, Artsy.net
Filippo Brunelleschi, Dome of the Cathedral of Florence by Dr. Beth Harris and Dr. Steven Zucker, smarthistory.org
Brunelleschi's dome that stunned the world: history of the Renaissance masterpiece, By Federico Giannini, Ilaria Baratta, finestresullarte.info
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