People view paintings at the Upper Belvedere in Vienna, Austria, on July 1, 2020. The Upper Belvedere reopened to visitors on Wednesday after a temporary closure due to the COVID-19 pandemic. (Photo by Georges Schneider/Xinhua)

People view The Bride by Gustav Klimt at the Upper Belvedere in Vienna, Austria, on July 1, 2020. The Upper Belvedere reopened to visitors on Wednesday after a temporary closure due to the COVID-19 pandemic. (Photo by Georges Schneider/Xinhua)

People visit the Upper Belvedere in Vienna, Austria, on July 1, 2020. The Upper Belvedere reopened to visitors on Wednesday after a temporary closure due to the COVID-19 pandemic. (Photo by Georges Schneider/Xinhua)

People view The Kiss (Lovers) by Gustav Klimt at the Upper Belvedere in Vienna, Austria, on July 1, 2020. The Upper Belvedere reopened to visitors on Wednesday after a temporary closure due to the COVID-19 pandemic. (Photo by Georges Schneider/Xinhua)

Photo taken on July 1, 2020 shows the reopened Upper Belvedere in Vienna, Austria. The Upper Belvedere reopened to visitors on Wednesday after a temporary closure due to the COVID-19 pandemic. (Photo by Georges Schneider/Xinhua)