Jørn Øverby still sees her when night falls. He had steered his boat towards Utøya as the gunfire echoed across the lake, one of the first civilians to reach the island. In the water, a girl floated face down, her Mickey Mouse shirt bright against the grey. A fist-sized hole gaped in her back. Øverby had to swerve past her; he was there to save the living. Fifteen years later, that image — the cartoon mouse, the wound, the impossible choice — returns unbidden, a private memorial to a public trauma.

On 22 July 2011, Anders Behring Breivik detonated a car bomb in Oslo’s government quarter, killing eight, then drove to the Labour Party youth camp on Utøya and, disguised as a police officer, shot dead 69 people, most of them teenagers. In the first chaotic hours, commentators across Europe assumed an Islamist attack. The truth was more disorienting: the terrorist was a native Norwegian, a far-right extremist who had distributed a 1,500-page manifesto calling for the forced remigration of Muslims and a crusade to save white Europe. The massacre was, in his words, a “necessary race war”.

Today, the Norwegian state has woven remembrance into the cityscape. A new national monument, “Underhåll”, now stands in the government quarter: a massive blue steel frame supporting a mosaic of a wading bird, assembled from more than 300,000 hand-cut stones with the help of survivors and young volunteers. Nearby, a dedicated 22 July centre displays Breivik’s fake police uniform, a curatorial choice that prompted the mother of the youngest victim to walk out, saying she had not been forewarned. The tension over what to preserve and what to shield is mirrored in Breivik’s own detention. He lives in a two-storey complex within Ringerike high-security prison, equipped with a fitness room, a games console, a kitchen, and three budgerigars. Norwegian legal experts describe the years of social isolation as the harshest available sanction, yet critics abroad see a “luxury prison” that mocks the gravity of his crimes.

Beyond the memorials, the ideological currents Breivik sought to unleash have not receded. The Norwegian Police Security Service warns that the far-right threat is greater now than in 2011, fuelled by online ecosystems where TikTok and gaming forums blend grotesque violence with humour and memes. Swedish political analysts observe that a government reliant on a far-right party has enacted policies — “vandel” assessments, conditional citizenship, subsidised “re-migration” — that echo the manifesto’s core demands. Italian commentators note that Breivik’s vision of mass remigration and contempt for the rule of law has, in the intervening years, migrated from the fringe to the rhetoric of mainstream Western politics. The wading bird on the Oslo monument is a mosaic of thousands of individual stones, a fragile act of collective repair. It stands in the shadow of the buildings Breivik bombed, a reminder that memory, like the bird, must be pieced together stone by stone, against a current that has not stopped flowing.