A staff member (R) wearing a face mask waits to guide visitors during the exhibition "Raffaello 1520-1483" in Rome, Italy, July 2, 2020. The "Raffaello 1520-1483" exhibition, the largest-ever retrospective of the life and work of Renaissance maestro Raphael, reopened to public recently at the Scuderie del Quirinale in Rome. Visitors, who had to wear face masks, were required to reserve precise entry times. Each visitor had his or her temperature taken by a digital thermometer upon entry. (Xinhua/Cheng Tingting)

A visitor views a painting during the exhibition "Raffaello 1520-1483" in Rome, Italy, July 2, 2020. The "Raffaello 1520-1483" exhibition, the largest-ever retrospective of the life and work of Renaissance maestro Raphael, reopened to public recently at the Scuderie del Quirinale in Rome. Visitors, who had to wear face masks, were required to reserve precise entry times. Each visitor had his or her temperature taken by a digital thermometer upon entry. (Xinhua/Cheng Tingting)

People visit the exhibition "Raffaello 1520-1483" in Rome, Italy, July 2, 2020. The "Raffaello 1520-1483" exhibition, the largest-ever retrospective of the life and work of Renaissance maestro Raphael, reopened to public recently at the Scuderie del Quirinale in Rome. Visitors, who had to wear face masks, were required to reserve precise entry times. Each visitor had his or her temperature taken by a digital thermometer upon entry. (Xinhua/Cheng Tingting)

People wait outside the Scuderie del Quirinale to visit the exhibition "Raffaello 1520-1483" in Rome, Italy, July 2, 2020. The "Raffaello 1520-1483" exhibition, the largest-ever retrospective of the life and work of Renaissance maestro Raphael, reopened to public recently at the Scuderie del Quirinale in Rome. Visitors, who had to wear face masks, were required to reserve precise entry times. Each visitor had his or her temperature taken by a digital thermometer upon entry. (Xinhua/Cheng Tingting)

People visit the exhibition "Raffaello 1520-1483" in Rome, Italy, July 2, 2020. The "Raffaello 1520-1483" exhibition, the largest-ever retrospective of the life and work of Renaissance maestro Raphael, reopened to public recently at the Scuderie del Quirinale in Rome. Visitors, who had to wear face masks, were required to reserve precise entry times. Each visitor had his or her temperature taken by a digital thermometer upon entry. (Xinhua/Cheng Tingting)