In the Vatican, even the shadows were expensive.
Pope Sixtus IV paced the length of his private chambers, the heavy, ermine-lined hem of his cape dragging across the marble. In his sixties, Sixtus was a heavy-set man with a sharp, downward-hooked nose, severe features, and heavy jowls. Draped in the absolute height of papal luxury—brilliant pale vestments contrasting against the rich fur of his cape, a towering, intricately detailed tiara resting nearby—he bore himself with the imperious, ruthless authority of a man who believed God answered to him.
Right now, God was the only one answering to him. A twenty-something Florentine banker was refusing to.
The Medici family had served as God’s bankers for decades, managing the immense, continent-spanning river of wealth that flowed into the Vatican. But Lorenzo de' Medici was no longer acting like a banker. He was acting like a rival prince.
Because Lorenzo wanted to protect Florence's borders, he had actively blocked the Pope from purchasing the strategic town of Imola. But Sixtus IV desperately wanted that land to elevate his own nephews into the aristocracy. So, pacing in his ermine cape, the Pope decided to hit the Medici where it would cripple them.
He stripped the Medici Bank of the papal accounts. Then, to make the insult a mortal wound, he handed the accounts to the Medici's bitterest rivals in Florence: the Pazzi family.
In the silence between cities, rebellion breeds.
*
Two hundred miles north, Florence still called itself a republic. In reality, it was a poisoned chalice.
Cosimo the Elder had conquered the city from the shadows, surviving exile and assassination by ensuring he never looked like a king. He had walked the streets in plain merchant wool, deeply paranoid, aware that the old patrician families harbored a simmering, violent resentment toward his monopoly on power.
His grandsons threw that paranoia into the Arno River.
Lorenzo de' Medici was in his late twenties, and he was strikingly ugly. He possessed a flattened, broken-looking nose, a heavy jaw, and a harsh, grating voice. Yet, he was overwhelmingly charismatic. Dressed in magnificent, high-contrast patterned brocades interwoven with gleaming metallic threads, he carried himself with total arrogant confidence. He masked his failures as a banker with the dazzling aura of a poet and a patron, locking eyes with foreign ambassadors and holding them entirely spellbound.
Beside him stood his younger brother, the golden boy. Giuliano de' Medici was in his mid-twenties, slim, athletic, and classically handsome. He had heavy, dark-toned, fashionably curled hair, a sharp noble nose, and a cleft chin. Wearing a sharply tailored dark velvet tunic with a high collar over a crisp pale undergarment, he possessed the carefree, arrogant vitality of a beloved prince. Giuliano was a jousting champion, a man who dedicated his tournament victories to the most beautiful women in the city.
He was also completely unaware of the target on his back.
Together, Lorenzo and Giuliano were the golden generation. If their grandfather Cosimo ruled by pretending he wasn’t a dictator, Lorenzo and Giuliano ruled by making Florence forget they were bankers. They sponsored dazzling public festivals, commissioned art, and projected absolute, invincible power.
But behind the brocade, the Medici Bank was rotting. Lorenzo was a genius of statecraft, but a dismal accountant. Branches across Europe were bleeding money. He had replaced his grandfather's careful ledger-keeping with blinding sunlight—and sunlight makes it very difficult to see the enemies gathering in the dark.
*
The Pazzi family did not need much encouragement to want the Medici dead.
Francesco de' Pazzi was a man who looked exactly like the violence he was about to unleash. In his early thirties, Francesco was tall, heavily muscular, and dark-featured, with ink-dark hair pulled tightly back over the nape of his neck. He wore ornate, high-end Florentine noble garb with sharp, aggressive tailoring. But the clothes could not hide the man beneath: his default bearing was that of a coiled spring—tense, bitter, and consumed by a frenzied, blinding hatred for the Medici.
Francesco had once been Lorenzo’s childhood friend. Now, fueled by jealousy and the sudden, massive influx of the Pope's banking wealth, he was the architect of his murder.
In the dimly lit rooms of the Pazzi Palace, the conspirators gathered. Francesco was joined by his calculating uncle Jacopo, the Pope’s nephew Girolamo Riario, and Archbishop Francesco Salviati, a clergyman whom Lorenzo had politically humiliated.
They had a motive. They had the money. They even had the Vatican’s permission. Pope Sixtus IV had given the plot his tacit blessing, famously telling the conspirators that he wanted the Medici removed from power but strictly forbade any "bloodshed"—a deeply hypocritical caveat delivered to a room full of men actively hiring assassins. The Pope offered them any other assistance they might need, effectively signing the Medici brothers' death warrants while keeping his own hands clean.
The conspiracy required absolute precision. The Medici brothers were a two-headed hydra; assassinating Lorenzo while leaving the popular Giuliano alive—or vice versa—would only trigger a civil war the Pazzi could not win. Both brothers had to die at the exact same moment.
Their initial plan was to poison Lorenzo and Giuliano at a lavish banquet at a Medici villa on April 25, 1478. The poison was prepared. The mercenaries were in place.
But Giuliano injured his leg in a hunting accident and stayed home. The banquet went off without a drop of blood spilled.
Desperate, terrified that their sprawling conspiracy would be discovered if they waited, Francesco de' Pazzi and the plotters pivoted. They would do it the very next morning. They would do it in public.
They would butcher the Medici in the middle of Easter Sunday Mass.
*
April 26, 1478.
The Cathedral of Santa Maria del Fiore—the Duomo—was a soaring, echoing cavern of incense and echoing Latin. Ten thousand Florentines packed into the nave beneath Brunelleschi's impossible dome. It was the holiest day of the Christian calendar. Lorenzo the Magnificent was already near the high altar, standing among the choir and the visiting dignitaries, unarmed and unarmored.
But Giuliano was missing.
Back at the Medici Palace, Giuliano was still in bed. The sciatica in his leg was a sharp, burning agony, and he had decided to skip the service.
If Giuliano did not come to the cathedral, the plot would collapse. So, Francesco de' Pazzi and a fellow assassin, Bernardo Bandini Baroncelli, left the crowded Duomo and walked through the sunlit streets to the Medici Palace to fetch him.
When they entered Giuliano's bedchamber, Francesco was smiling.
"The city waits for you, Giuliano," Francesco coaxed, his voice warm, layered with the easy camaraderie of two noblemen. "It is Easter. The crowd will be disappointed if the golden boy does not show his face."
Giuliano, trusting and weary from the pain in his leg, finally relented. He dressed in his fine dark velvet, leaving his heavier layers behind.
The walk from the Medici Palace to the Duomo was only a few hundred yards, but for Francesco de' Pazzi, every step was a tightrope over an abyss. If Lorenzo left the church early, they were dead. If Giuliano's guards sensed their tension, they were dead.
As they walked through the bustling streets, Francesco wrapped his heavily muscled arm around Giuliano's shoulder. He pulled the younger Medici in close, laughing, patting his chest and back in a display of deep, brotherly affection.
To the citizens of Florence, it looked like a beautiful diplomatic triumph: the heir of the Pazzi and the heir of the Medici, walking together in peace on Easter morning.
In reality, Francesco’s fingers were aggressively digging into the fabric of Giuliano's doublet.
He was pressing against Giuliano's ribs, his stomach, his back. He was searching for the tell-tale rigidity of a steel cuirass. He was feeling for the dense, heavy rings of a chainmail shirt hidden beneath the velvet. If Giuliano was wearing armor, Francesco's dagger would snap against it, and the golden boy would survive.
Francesco patted Giuliano's chest one last time, laughing at a joke the young prince had just made.
Under the velvet, there was only soft linen, and flesh.
Giuliano, limping slightly but smiling at the cheering crowds, stepped out of the bright spring sunlight and into the cool, incense-heavy shadows of the Duomo. Ten thousand worshippers parted to let him through. And Francesco de' Pazzi, his hand resting gently on Giuliano's back, walked him down the aisle.