Few Old Master paintings possess as turbulent an object history as the Ghent altarpiece, now restored, since World War II, to the city’s cathedral for which it was made. While most accounts focus on the longue durée perspective, especially the work’s looting by Napoleon and Hitler, this article examines the altarpiece’s history following its return to Belgium in 1945. The altarpiece was subject to increased sensitivity at home after its wartime wanderings, and a major controversy ensued when the government backed a radical conservation project, which took place under the direction of Paul Coremans at the Royal Museum in Brussels between 1950 and 1951. The project served to emphasize the rift between north and south in Belgium in the newspaper press and became a focus for the international community as it battled to establish new standards in art restoration in the aftermath of the war.