Authorities in Italy on Wednesday began work to secure Rome’s Constantine Arch after a lightning strike broke fragments from the ancient monument. A violent thunder and lightning storm that felled trees and flooded streets in the Italian capital damaged the honorary arch late Tuesday afternoon. Fragments of white marble were gathered and secured by workers for the Colosseum Archeological Park as soon as the storm cleared, officials said. “The recovery work by technicians was timely. Our workers arrived immediately after the lightning strike. All of the fragments were recovered and secured,” th…