Location from Harry Potter by J.K. Rowling
A fortress-prison built by the dark wizard Gellert Grindelwald to hold his enemies, where he was ultimately imprisoned himself after his defeat by Dumbledore in 1945.
Nurmengard is irony made stone. Grindelwald built it at the height of his power to imprison those who opposed his vision of wizarding supremacy over Muggles — and spent the last fifty-three years of his life locked in its highest cell after Dumbledore defeated him in their legendary 1945 duel. He was still there when Voldemort came looking for the Elder Wand, and Grindelwald — old, emaciated, but unbroken — refused to reveal its location, laughing in the face of death. Whether this was courage, spite, or a final attempt at redemption for the damage he'd caused is one of the series' open questions. Voldemort killed him anyway.
A stark, imposing fortress high in the mountains of continental Europe. The entrance once bore the inscription 'For the Greater Good' — Grindelwald's slogan. The walls are thick stone, the cells cold and bare. After Grindelwald's defeat, the fortress was repurposed to hold its creator as its sole notable prisoner.
Also known as: Nurmengard, Nurmengard prison, Grindelwald's prison