Photo taken on March 23, 2017 shows the ancient city of Graz in Austria. Graz is the second largest city in Austria with a population of over 270,000 after Vienna. In 1999, Graz was added to the UNESCO list of World Cultural Heritage Sites. The city is famous for its renaissance and baroque architecture, as well as excellent urban roofscaping. (Xinhua/Gong Bing)
