Dr. Cornel Dora Director, director of the Abbey Library, speaks in the library in north-eastern Switzerland's St. Gallen city on April 20, 2018. The library is one of the richest and oldest in the world and contains 170,000 works and some 2,100 original medieval handwritten manuscripts, including the earliest-known architectural plan drawn on parchment. (Xinhua/Xu Jinquan)