Gold and blood: When siena defied florence
Imagine a summer night in Siena, 1311. The cobbled streets, bathed in the trembling glow of torches, hum with an unusual murmur. This is no ordinary religious procession winding through the city, but a solemn cortege carrying a monumental work, swathed in scarlet silk. The church bells ring out in full peal, merchants close their stalls, and even the children fall silent, awed by the atmosphere of reverence. At the heart of this crowd is Duccio’s Maestà, a seven-metre-high altarpiece, just completed after three years of secret labour. This is not merely a painting: it is an offering, a talisman, a declaration of artistic war on rival Florence. When the work is finally unveiled in the cathedral, the Sienese hold their breath. The gold ground shimmers like a piece of heaven descended to earth, the faces of the saints seem to breathe, and the Virgin, draped in a midnight-blue mantle studded with stars, gazes at the congregation with a majesty both tender and melancholy. That day, Siena does not merely celebrate a masterpiece—it asserts its spiritual and aesthetic superiority over Florence, that arrogant city already daring to proclaim itself the cradle of the Renaissance.
By Artedusa
••8 min readYet behind this rivalry lies a deeper truth: Siena and Florence were not merely fighting over territory or markets. They were inventing two visions of the world, two ways of conceiving beauty, two opposing answers to the same question: how to represent the sacred in a century when God seemed to be receding, when cities grew rich, when plague lurked? In Florence, Giotto painted solid bodies, sturdy architecture, raw emotion—a naturalistic revolution that heralded the Renaissance. In Siena, Duccio and Simone Martini responded with gold, grace, restrained feeling, as if divine light itself could slip between the pigments. Their art was not a rejection of progress, but another kind of boldness: the belief that spirituality could still be expressed through delicacy, that faith deserved to be wrapped in silk and azure.
01The city that prayed in blue and gold
At the beginning of the fourteenth century, Siena was no ordinary city. Perched on three Tuscan hills, it commanded the trade routes between Rome and northern Europe, and its public treasury overflowed with gold from wool commerce and banks that financed popes and kings. But what made it unique was its relationship with the sacred. Unlike Florence, where merchants and bankers were beginning to celebrate man and his achievements, Siena saw itself as a chosen city, placed under the direct protection of the Virgin Mary. Its cathedral was not merely a place of worship: it was the beating heart of the city, a vessel of black-and-white marble where every column, every stained-glass window, every fresco told of God’s glory—and Siena’s.
It was in this context that Duccio di Buoninsegna received, in 1308, the most prestigious commission of his career: to paint an altarpiece for the high altar of the cathedral. The contract, preserved in the city archives, is a fascinating document. It stipulated that Duccio must work exclusively on this piece, under pain of excommunication, and that he would be paid sixteen soldi a day—a fortune for the time. But more than the money, the stakes were colossal: the Maestà had to surpass everything that had come before, including the works of Cimabue and Giotto in Florence. For Siena, this was not merely about embellishing an altar. It was about creating an icon capable of protecting the city, reminding the Florentines of their arrogance, and asserting that beauty could be an act of devotion—and of defiance.
When one looks today at the scattered panels of the Maestà (some in the Museo dell’Opera del Duomo in Siena, others in the National Gallery in London or the Metropolitan Museum in New York), what strikes is how Duccio transcended Byzantine conventions without rejecting them. The gold grounds, traditional in medieval art, are no longer mere flat expanses of brilliance: they shimmer, as if worked with a burin, with geometric patterns that catch the light. The faces, once hieratic, now come alive with a new tenderness. The Virgin at the centre is no longer a distant, inaccessible figure: she tilts her head slightly, as if listening to the prayers of the faithful, and her blue mantle, embroidered with gold thread, seems made of such real fabric that one could almost touch it. Around her, the saints and angels form a celestial court, but their gazes are not turned toward the viewer. They speak to one another, exchange discreet gestures, as in an intimate conversation. Even the Passion scenes on the reverse of the altarpiece tell the story of Christ with unprecedented narrative intensity: in The Entry into Jerusalem, children climb trees to see Jesus pass, while adults spread their cloaks in his path. For the first time, a religious painting did not merely illustrate a dogma—it brought a story to life.
02Simone Martini, or the art of painting the ephemeral
If Duccio was the master of grand altarpieces and solemn compositions, Simone Martini, his junior by a generation, brought to Siena a touch of poetry and refinement that would leave its mark on all of Europe. Born around 1284, he grew up in Duccio’s shadow, but his genius lay in his ability to capture the moment, to seize emotion in its most fleeting form. His masterpiece, The Annunciation (1333), now in the Uffizi Gallery in Florence, is a perfect example of this alchemy between spirituality and worldly grace.
Picture the scene: an angel with outspread wings, clad in a pale pink robe embroidered with gold, has just alighted in Mary’s chamber. His feet do not quite touch the ground, as if he were still floating in the air. In his hand, he holds an olive branch, symbol of peace, but it is his gesture that fascinates: he points at Mary with an outstretched finger, as if delivering an urgent message. Before him, the Virgin recoils slightly, startled, almost frightened. Her book slips from her lap, and her fingers clutch at her midnight-blue mantle. This is not the passive reaction of a Byzantine saint, but that of a young woman caught off guard. Simone Martini has captured hesitation, vulnerability, the precise moment when the divine collides with the human.
What makes this work revolutionary is its ability to blend the sacred and the profane without ever lapsing into sentimentality. The traditional gold ground is here worked with such finesse that it seems to radiate from within. The halos of the figures are not mere golden circles: they are chiselled, pierced, like jewels. The folds of the garments, painted with almost calligraphic precision, evoke silk and brocade. Even the smallest details—the veins in the angel’s wings, the reflections on the vase of lilies—are rendered with a delicacy bordering on obsession. Yet despite this technical virtuosity, the work never feels cold or artificial. On the contrary: it breathes, it vibrates, as if Simone Martini had succeeded in capturing the very essence of grace.
This mastery of detail and emotion earned Simone Martini international renown. In 1317, he was summoned to Naples by King Robert of Anjou, who commissioned an equestrian portrait of his brother, Saint Louis of Toulouse. Then, in the 1320s, he travelled to Assisi, where he painted a series of frescoes on the life of Saint Martin in the lower basilica. But it was in Avignon, where he settled in 1336 at the invitation of Pope Benedict XII, that his influence became truly European. There, in that cosmopolitan court where French cardinals, Italian poets, and Flemish artists mingled, Simone Martini introduced the Sienese style—its luminous colours, its slender figures, its blend of devotion and refinement—which would inspire all of international Gothic painting. Even Petrarch, who met him in Avignon, was captivated by his talent. In a letter, he wrote: "Simone painted Laura, and her features remained etched in my heart as if they were alive." (We do not know if this portrait ever existed, but the anecdote speaks volumes about the artist’s reputation.)
03Gold, blood, and plague: when history catches up with the artists
Yet behind this apparent serenity, Siena was living through dark times. In 1348, the Black Death struck the city with unimaginable violence, carrying off more than half the population. The streets, once bustling with merchants and pilgrims, emptied. The painters’ workshops closed, commissions dried up. Duccio had been dead for nearly thirty years, Simone Martini for four, but their legacy suddenly seemed under threat. Florence, less ravaged by the epidemic, took advantage of its rival’s weakness to impose its artistic hegemony. Giotto, Masaccio, and later Botticelli and Leonardo da Vinci would make the city of the Medici the new beacon of Western art.
Yet Siena did not entirely disappear. Its style, carried on by artists like the Lorenzetti brothers and later Sassetta, survived in the shadows, like a forgotten melody that still lingers. And if one looks closely at the works of the Florentine Renaissance, one sometimes finds echoes of that Sienese grace. The deep blue of Duccio’s Virgin reappears in Raphael’s Madonnas. The delicacy of Simone Martini’s drapery inspires Botticelli’s angels. Even Leonardo’s sfumato—that atmospheric blur that lends such mystery to his portraits—may owe something to the way Sienese painters made light shimmer on gold.
Today, when we stand before the Maestà or The Annunciation, we are not merely contemplating masterpieces. We are witnessing the testament of an era when art was more than a question of technique or style: it was a way of believing, of resisting, of dreaming. Siena may not have "won" its rivalry with Florence. But it left something more precious than victory: another way of seeing the world, where beauty was not an end in itself, but a path to the sacred. And that, no plague, no war, no artistic revolution can ever erase.