The Holiest of Holies or Holy of Holies was a chunk of wreckage from the first Death Star that was recovered by Ugor scavengers shortly after the Battle of Yavin. The salvage contained a prototype gravity well projector that the Ugors' priest-scientists discovered could be used to order the chaotic spread of garbage in the Ugor's home, the Paradise system. After this discovery, the projector was dubbed the Prime Mover, and the wreckage in which it was housed was called the Holy of Holies or Holiest of Holies.