France and Equatorial Guinea are locked in a bitter row over a luxury mansion in one of the swankiest districts of Paris, with French authorities putting it up for sale but the west African nation refusing to relinquish the premises.

The over-100-room building on 42 Avenue Foch in the upscale 16th arrondissement of western Paris has served for the last 15 years as the embassy of Equatorial Guinea, the flag of which flutters from the roof. It was formally put up for sale in June by French authorities as part of the judiciary's years-long investigation into ill-gotten wealth that targeted luxury assets acquired by the leaderships of autocratic west African nations.

But the Equatorial Guinea diplomats who still inhabit its upper floors have refused to leave, defying an order from a Paris court to vacate the premises. An interested bidder visiting in September was shooed away by the military attache, according to a person with knowledge of the case. The former owner was the powerful vice president of Equatorial Guinea, Teodoro Nguema Obiang Mangue, known as Teodorin or Teddy, the son of President Teodoro Obiang Nguema Mbasogo.

Teodoro Obiang has led the oil-rich country of under two million people, the only Spanish-speaking state in Africa, since 1979, the second longest serving non-royal leader anywhere in the world, after Paul Biya of neighboring Cameroon. His son in June condemned the forced sale of the building as "illegal" and warned that Equatorial Guinea could take "sovereign" measures of retaliation up to a breaking-off of diplomatic relations.

The building became the embassy in 2011 and was already formally confiscated in 2021 when Teodorin was sentenced by the French courts to three years suspended imprisonment and a €30 million fine for misuse of assets. According to the French justice system, his lavish spending did not match his official income, but rather the millions that vanished from the public treasury and were transferred to his personal accounts. Close naval school?

Equatorial Guinea has levers, notably an old deal that makes two plots of land – one in the former capital Malabo that houses the French embassy and another in the largest city Bata that houses a francophone cultural center – available to France free of charge for a renewable 50-year term. But above all, the authorities could decide to close the naval school at the port of Tica, established as a joint venture between France and Equatorial Guinea to train regional naval forces. Paris is deeply uneasy about more retrenchment from Africa after the takeovers of pro-Moscow military juntas in Burkina Faso, Mali and Niger prompted French forces to pull out.

Equatorial Guinea has gone to the UN International Court of Justice over the issue, but the Hague-based court has twice ruled in France's favor. The embassy and government did not comment when contacted by Agence France-Presse, but a source close to the Equatorial Guinea authorities insisted it was serious about retaliation.

"For France, having been ousted from everywhere else in the Sahel, nurturing its military cooperation with Equatorial Guinea ought to be a priority," said the source. "They [the authorities] could very well say: 'We'll do what Mali did – shut down Tica and replace you with the Russians.' And all that over an old, unoccupied building." Beware mystery buyer French authorities have already disabled security cameras and changed the locks on the building but not on the fourth and fifth floors, which are occupied by the ambassador, the two first secretaries, the military attache, and the head of protocol.

French authorities want the sale wrapped up by December, and a court order allows the eviction of the diplomatic staff, but Paris appears eager to avoid such visual drama. "No one wants it to come to a forced eviction in front of the cameras; we would all lose," said a French government source.

Viewings began on September 9, with prospective buyers given a tour of the first three floors. But the five diplomats are still arriving to work on the upper floors, which are now in a state of severe disrepair, lacking both running water and electricity.

Meanwhile, the French agency organizing the sale is mindful of the need to screen potential buyers and make sure they do not fall foul of anti-money laundering legislation. The prime concern is to avoid the absurd but plausible scenario that none other than Teodoro Nguema Obiang, acting through a front, could slip in among the buyers. "Not only would he end up owning the building again, but Malabo would also recoup the proceeds from the sale," said one source.