Built in 1443, this magnificent Gothic hospital (until 1971) is famously topped by stunning turrets and pitched rooftops covered in multicoloured tiles. Interior highlights include the barrel-vaulted Grande Salle (look for the dragons and peasant heads up on the roof beams); the mural-covered St-Hughes Room; an 18th-century pharmacy lined with flasks once filled with elixirs and powders; and the multipanelled masterpiece Polyptych of the Last Judgement by 15th-century Flemish painter Rogier van der Weyden, depicting Judgment Day in glorious technicolour.