Complex sentence: His gravestone was destroyed in the 1930s, along with the rest of the cemetery; as of 2006, the monastery reported having approximately determined the location of the grave (based on old records), and planning archaeological excavations in the area.
Split into simpler sentences: His gravestone was destroyed in the 1930s, along with the rest of the cemetery. As of 2006, the monastery reported having approximately determined the location of the grave (based on old records), and planning archaeological excavations in the area.