A fire on Friday night largely destroyed the Kehlsteinhaus — Hitler's former mountain retreat known as the Eagle's Nest — perched at 1,834 metres on the Obersalzberg peak in Bavaria. About 200 firefighters from six municipalities responded but were hampered by the building's extreme altitude, strong winds, rain turning to snow, and the need for heavy breathing apparatus. The blaze was reportedly still burning at 7am Saturday. Police arrested a 33-year-old German citizen with ties to the area. Prosecutors said he showed signs of mental illness and was transferred to a psychiatric facility after questioning. Investigators are examining whether a political motive existed but said there was no indication of additional suspects. The fire was triggered by an alarm at 9.15pm; by the time crews arrived 35 minutes later, the building was fully engulfed. The Kehlsteinhaus was constructed between 1937 and 1938, formally inaugurated on Hitler's birthday in 1939, and was one of the few undamaged monuments of the Hitler era. Accessible only via a road cut through previously impassable terrain and a 124-metre brass lift buried in the mountain, the building has served since 1952 as a historical exhibition run by the Institute for Contemporary History and as a restaurant. Its website describes it as a monument to "the insanity of the regime." Bavaria's interior minister Joachim Herrmann told reporters: "We're not going to leave a ruin there," emphasizing the importance of continuing "the work of remembrance." Officials indicated the state-owned building would be restored following consultations with local officials, historians, and conservators. A police spokesperson told Bild the building was "damaged to a large extent" and "unlikely to be saved" in its current state. The structural question here is straightforward: who benefits and who pays when a singular heritage site is destroyed. The building existed as a physical counterargument to forgetting — a preserved artifact that forced visitors to confront the regime's grandiosity and its consequences, including the deaths of millions of Jews, Roma, LGBTQ people, and communists in the Holocaust. Its destruction, regardless of the perpetrator's motive, removes a tangible anchor of historical memory and shifts the burden of remembrance onto the costlier and less certain process of reconstruction. The 20-year question is whether reconstructed heritage carries the same weight as preserved heritage. A rebuilt Kehlsteinhaus will be a replica with interpretive signage, not an original structure that survived Allied bombing. Bavaria's commitment to rebuild is the right instinct, but the irreplaceable thing — an intact physical witness to the Third Reich — is gone. The fire did not create new capability; it destroyed a unique, non-reproducible public good.