"The most beautiful part of the mosaic from the fourth century was severely damaged," said Dror Ben Yosef of the antiquities authority. "The perpetrators drilled a hole in the drawing of the holy ark and damaged the menorah drawing as well. It seems they worked very hard trying to take apart the floor."
A zodiac wheel (described in the novel in detail) drawn on the mosaic appears to have been hit by a pickax. For more: Temple vandalized