… restoration. The work was paid for by an anonymous donor who didn't want the pricetag to be made public, officials said. Ioli Kalavrezou, a Byzantine art history professor at Harvard University who has taught classes on the cross, said the restoration …

… restoration. The work was paid for by an anonymous donor who didn't want the pricetag to be made public, officials said. Ioli Kalavrezou, a Byzantine art history professor at Harvard University who has taught classes on the cross, said the restoration …