Sister Gabrielle (Germaine Robberechts) vanished on March 5, 1982, from a Dendermonde convent, marking one of Belgium's most enduring cold cases. Despite a 2022 search effort using advanced technology to locate her car or remains, the case remains unsolved, potentially linked to uncovered financial irregularities within the institution. For more details on this case and other Belgian mysteries, you can explore the Belgian Federal Police's missing persons database or follow investigative reports from The Brussels Times.