Monaco Royal Relative Antoine de Massy Dies at 29 After 42-Foot Fall: His Father Breaks His Silence as Manslaughter Probe Unfolds

Baron Christian de Massy has broken his silence following the sudden, tragic death of his 29-year-old son, Antoine de Massy, a close relative of Monaco’s royal family. The young tech entrepreneur and former Florida-based tennis prospect died on October 25 after falling roughly 42 feet (13 meters) into a garden along the Larvotto promenade in the principality.

The tragedy sent shockwaves through Monaco and international circles, prompting an immediate police investigation after Antoine failed to show up for a scheduled family lunch.

In an emotional interview with Italian daily Corriere della Sera, Baron Christian spoke about the agonizing moment he learned his only child was gone.

Antoine de Massy.

“When my nephew Sébastien told me that there was no hope for my only son Antoine, he was dead, I couldn’t understand,” the Baron shared. “I told him, ‘But if he’s lost, let’s go look for him.'”

The grieving father described Antoine as a “boy with a big heart,” adding, “Every day, for 29 years, we were always together.”

A Father’s Rejection of Rumors and the Active Investigation

Public speculation quickly spread regarding what led to the 42-foot fall. However, Baron Christian firmly rejected theories circulating in the immediate aftermath.

“It absolutely wasn’t an accident, nor was it suicide, nothing like that, but I can’t talk about it now because there’s an ongoing investigation.”

Despite early public assumptions pointing toward a simple misstep or self-harm, legal authorities are treating the circumstances with intense scrutiny. Monaco law enforcement launched an inquiry immediately after the young royal’s body was discovered.

The Final Hours and the Legal Charges

According to local media accounts, Antoine de Massy spent his final hours at the renowned Sass’ Cafe club in Monaco. He was seen leaving the venue during the early morning hours alongside another man.

That companion—identified by authorities as a Ukrainian national—was subsequently arrested and charged with involuntary manslaughter. The individual was remanded into custody after refusing to answer investigators’ questions during interrogation.

Antoine de Massy at the 10th anniversary of the Embassy of Monaco in Washington in 2016.

Monaco Prosecutor Stéphane Thibault explained to Monaco-Matin that the detained man is currently considered a suspect or witness while his exact legal status is being established. The prosecutor noted that officials have not completely ruled out an accidental event as the official post-mortem examination proceeds.

Deep Ties to Miami and the Princely House of Grimaldi

Antoine was deeply intertwined with both international royal lineage and American life. He was the son of Baron Christian de Massy and Cécile Gelabale.

Through his father, he was the first cousin once removed of Monaco’s sovereign, Prince Albert II. His paternal grandmother, Princess Antoinette, was the older sister of Prince Rainier III.

Antoine de Massy, royal relative to Prince Albert II of Monaco.

Across the Atlantic, Antoine spent much of his upbringing in South Florida. He relocated to Miami with his father at the age of eight to pursue elite competitive tennis.

A severe wrist fracture altered his athletic trajectory, steering him into academics and business. He earned his degree in international relations and affairs at Florida International University (FIU) before launching a career as a tech entrepreneur.

Prince Albert II and Princess Charlene of Monaco.

Prince Albert II and Princess Charlene formally expressed their sorrow following the loss. The Princely Palace issued a tribute recognizing Antoine’s life and the family’s historic connections to Monegasque athletics.

“Their Serene Highnesses Prince Albert II and Princess Charlène were saddened to learn of the death of Antoine de Massy, aged 29, the grandson of Princess Antoinette, the elder sister of Prince Rainier III. A keen tennis player, he was part of a family history closely linked to the sport in the Principality.”

The royal family scheduled an evening vigil in the Palace chapel, followed by the funeral service at the Cathedral of Our Lady Immaculate in Monaco. Close friends from Miami and Argentine tennis coach Leandro Gubler are traveling to Monaco to pay their final respects.

💬 This heartbreaking loss has shocked royal watchers and friends across the globe.

✨ Antoine’s journey from South Florida’s tennis courts to Monaco’s tech scene left an indelible mark on those who knew him.

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