Nicolas Sarkozy has become the first French ex-president to go to jail, as he starts a five-year sentence for conspiring to fund his election campaign with money from late Libyan dictator Muammar Gaddafi.
Not since World War Two Nazi collaborationist leader Philippe Pétain was jailed for treason in 1945 has any French ex-leader gone behind bars.
Sarkozy, who was president from 2007-2012, has appealed against his jail term at La Santé prison, where he will occupy a small cell in the isolation wing.
More than 100 people applauded and shouted Nicolas! as he left his villa in the exclusive 16th district of Paris, holding his wife Carla Bruni-Sarkozy by the hand.
His son Louis, 28, had appealed to supporters for a show of support, while another son, Pierre, called for a message of love – nothing else, please.
Nicolas Sarkozy, 70, was driven through the entrance of the notoriously overcrowded 19th-Century prison in the Montparnasse district south of the River Seine at 09:40 local time (07:40 GMT), while dozens of police officers cordoned off most of the surrounding streets.
He continues to protest his innocence in the highly controversial Libyan money affair and posted a message on X as he was driven to the jail, saying: I have no doubt. Truth will prevail. But how crushing the price will have been.
Moments after Sarkozy entered jail, his lawyer Christophe Ingrain said a request for his release had been filed. Nothing justified his imprisonment, said Mr Ingrain, adding: He'll be inside for at least three weeks or a month.
Sarkozy has said he wants no special treatment at La Santé prison, although he has been put in its isolation section for his own safety as other inmates are infamous drugs dealers or have been convicted for terror offences.
Sarkozy's cell in the prison's isolation wing is believed to be on the top floor and will measure between 9-11 sq m (95-120 sq ft). There had earlier been talk of him serving his term in another wing for vulnerable people, where other VIPs have been jailed in the past.
He will have a toilet, a shower, a desk, a small electric hob and a small TV, for which he will have to pay a monthly €14 (£12) fee, and the right to a small fridge.
The former president has the right to receive information from the outside world and family visits as well as written and phone contact. But he is in effect in solitary confinement, allowed just one hour a day for exercise, by himself in the wing's segregated courtyard.
At the end of last week, Sarkozy was received at the Élysée Palace by President Emmanuel Macron, who told reporters on Monday it was normal that on a human level I should receive one of my predecessors in that context.
Macron stressed on Tuesday that it was not his role to comment on or criticise judicial decisions, but he said it was normal that for many in France the sight of a president jailed by this judicial decision would provoke comment.
In a further measure of official support for the ex-president, Justice Minister Gérald Darmanin said he would go to visit him in prison as part of his role in ensuring Sarkozy's safety and the proper functioning of the jail.
Ever since he left office in 2012, Sarkozy has been dogged by criminal inquiries and for months had to wear an electronic tag around his ankle after a conviction last December for trying to bribe a magistrate for confidential information about a separate case.
Late next month, France's highest administrative court will give its verdict on Sarkozy's appeal against a six-month jail term in another illegal campaign financing case known as the Bygmalion affair.
Sarkozy has always denied doing anything wrong in a case involving allegations that his 2007 presidential campaign was funded by millions of euros in Libyan cash.
The former centre-right leader was cleared of personally receiving the money but convicted of criminal association with two close aides, Brice Hortefeux and Claude Guéant, for their role in secret campaign financing from the Libyans.
Sarkozy said he would take two books with him into prison, a life of Jesus by Jean-Christian Petitfils and the Count of Monte Cristo, Alexandre Dumas's classic story of a man wrongly imprisoned who escapes to wreak vengeance on his prosecutors.
