A historic theater in the Russian-occupied Ukrainian city of Mariupol has opened its doors more than three years after it was pummeled in a Russian airstrike that killed hundreds of civilians sheltering inside.

Moscow-installed authorities marked the rebuilding of the Donetsk Academic Regional Drama Theater with a gala concert on the building’s new main stage Sunday night. Images shared by Russian state media outlets showed the building’s marbled pillars and staircases, and dancers wearing traditional Russian headdresses known as kokoshniks performing.

The original theater was destroyed when it was targeted by a Russian airstrike on March 16, 2022, as Moscow’s forces besieged the city in the weeks after their invasion.

An Associated Press investigation later found evidence that the attack killed about 600 people inside and outside the building — almost double an early estimate from the government.

At the time of the strike, hundreds of civilians had sought refuge in the building after weeks of relentless shelling. The word “children” had been written with paint on the street outside the building, large enough to be seen by both pilots and satellites.

Moscow said that Ukrainian forces demolished the theater, a claim that the AP’s investigation refuted.

Russian forces took control of Mariupol’s city center shortly after the strike. The ruins were bulldozed and any remains were taken to the ever-growing mass graves in and around Mariupol.

Mariupol’s Ukrainian city council, which left the city when it was occupied for Ukrainian-controlled territory, called the rebuilding and the opening of the theater “singing and dancing on bones.”

“The ‘restoration’ of the theater is a cynical attempt to conceal the traces of a war crime and part of an aggressive policy of Russification of the city. The repertoire consists largely of works by Russian writers and playwrights,” the council said in a statement on Telegram.

Guests of honor at Sunday’s opening included Denis Pushilin, the Russian-installed head of the partially occupied Donetsk region, and St. Petersburg Gov. Alexander Beglov. Workers from St. Petersburg, which was twinned with Mariupol after Russia took full control of the city in May 2022, aided in the building’s reconstruction.

The Donetsk region, where Mariupol is located, has remained a key battleground throughout the war. Russia illegally annexed it in 2022, though Moscow still doesn’t control all of it. The region’s fate is one of the major sticking points in negotiations to end the war.

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Follow AP’s coverage of the war in Ukraine at https://apnews.com/hub/russia-ukraine