تل حلف
In 1913, Oppenheim decided to return temporarily to Germany. The finds of Tell Halaf were left at the building he and his team had inhabited during the dig. Most of them were securely packaged and stored. The outbreak of World War I prevented Oppenheim from returning. However, Oppenheim was able to sell some of the stone reliefs, pottery and other artefacts he had excavated to various museums after the war including the British Museum and Walters Art Museum in Baltimore.