All I could think of was, ‘Oh, my word, it's an art historian's dream come true!'" The painting's significance was immediately apparent: it is one of only a handful of works documenting the Old ...

Co-owner Ebi Kohlbacher found the couple at a nearby coffee shop, and Wienerroither called the art historian Alfred Weidinger. The painting, which depicts an African prince, turned out to be a ...