If Rotterdam's stunning heist of Picasso, Monet and Matisse paintings last month focused attention on the murky world of art theft, Ghent's gothic Saint Bavo cathedral has been at the center of a crime that has bedeviled the art world for decades. The Just Judges panel of the Van Eyck brothers’ multi-panel Gothic masterpiece hasn't been seen since 1934, when chief suspect Arsene Goedertier suffered a stroke at a political rally close to Ghent and died after murmuring possibe clues to the crime to a confidant.