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27–28 May: Final battles; executions at Père-Lachaise Cemetery

On the morning of 27 May, the regular army soldiers of Generals Grenier, Paul de Ladmirault and Jean-Baptiste Montaudon launched an attack on the National Guard artillery on the heights of the Buttes-Chaumont. The heights were captured at the end of the afternoon by the first regiment of the French Foreign Legion. One of the last remaining strongpoints of the National Guard was the Père Lachaise Cemetery, defended by about 200 men. At 6:00 in the evening, the army used cannon to demolish the gates and the First Regiment of naval infantry stormed the cemetery. Savage fighting followed around the tombs until nightfall, when the last Communards were taken prisoner. The captured guardsmen were taken to the wall of the cemetery and shot. Another group of prisoners, consisting of officers of the National guard, was collected at Mazas Prison and La Roquette prison. They were given brief trials before the military tribunal, sentenced to death, and then delivered to Père Lachaise. There they were lined up in front of the same wall and executed in groups, and then buried with them in a common grave. This group include one woman, the only recorded execution of a woman by the army during the Bloody Week. The wall is now called the Communards' Wall, and is the site of annual commemorations of the Commune.

On 28 May, the regular army captured the remaining positions of the Commune, which offered little resistance. In the morning, the regular army captured La Roquette prison and freed the remaining 170 hostages. The army took 1,500 prisoners at the National Guard position on Rue Haxo, and 2,000 more at Derroja, near Père Lachaise. A handful of barricades at rue Ramponneau and Avenue de Tourville held out into the middle of the afternoon, when all resistance ceased.