Photo taken on April 18, 2019 shows a view of the garden of the Sanssouci Palace in Potsdam, Germany. The Sanssouci Palace was built from 1745 to 1747 as the summer palace for Prussian King Frederick II and expanded from 1840 to 1842. The palace was built on terraced vineyards and connected to a Baroque garden below. The Sanssouci Palace and its extensive gardens were selected as a world heritage site by UNESCO in 1990. (Xinhua/Shan Yuqi)