According to a first assessment, the one and a half metre (five feet) high basalt stele which was used as a buttress in the wall of a monastery shows a fertility or agricultural god.

Classical scholar and excavation director Prof. Dr. Engelbert Winter and archaeologist Dr. Michael Blömer said: “The image is remarkably well preserved. It provides valuable insights into the beliefs of the Romans and into the continued existence of ancient Near Eastern traditions.
“However, extensive research is necessary before we will be able to accurately identify the deity.”
http://www.uni-muenster.de/Religion-und-Politik/en/aktuelles/2014/nov/PM_Unbekannte_Goetterdarstellung_entdeckt.html