Founded in 1242 by a grieving duchess after the Mongol devastation of Poland, the abbey began modestly, a Benedictine foothold in uncertain terrain. But time, and the ambitions of successive monastic orders, reshaped it into something far grander. By the 18th century, the complex had blossomed into one of Europe’s most extravagant Baroque ensembles—a kind of sacred theater where architecture, painting, sculpture, and music merge into a single overwhelming gesture.  At its heart stands the Basilica of the Assumption, a structure less built than orchestrated. Its vast interior—nearly 80 meters long—unfolds like a carefully composed illusion, where frescoes climb ceilings and saints seem to hover in midair.  Yet the abbey’s beauty masks a turbulent past. It has been burned by Hussites, scarred by the Thirty Years’ War, and secularized by Prussian decree. During World War II, its quiet halls were used to hide priceless manuscripts: scores by Mozart, Beethoven, and Bach.…