I have been invited to give an open lecture at OhioState University, free to the public. In English. Speaker: Siu-Leung Lee, PhD Title: How maps turn world history upside down – A critical analysis of world maps and 600 years of world exploration Sponsors : the Institute of Chinese Studies and National East Asian Languages Resources Center, Ohio State University Date: October 7, 2016 (Friday). Time: 4-5:30pm Venue: Mendenhall, 125 S Oval Mall. This talk will present evidence that Chinese in Ming dynasty not only visited America, but surveyed and mapped the world, 60 years prior to Christopher Columbus. Solid evidence is built on comparison of more than 600 maps published between 14th century and 19th century. The 1602 Chinese world map that has been believed to be the work of Matteo Ricci is actually constructed around 1430 by Chinese after 6 major voyages led by Admiral Zheng He. This map Kunyu Wanguo Quantu is available online from the websites of the Library of Congress and University of Minnesota Library. It is called Impossible Black Tulip because according to European history of the Age of Exploration, European cartographers could not have drawn the map. This lecture will revise what we have learned about the Age of World Exploration in the 15th century. History has to be rewritten to reflect the facts and logic. It will have significant impact on education and international relationship as well as status of overseas Chinese. I have given more than 30 lectures to higher education institutions in Beijing, Hong Kong, Taipei, Melaka, Xiamen and Dubai. These institutions include Academia Sinica (Taipei), Peking University, Tsinghua University, University of Foreign Affairs, Capital Normal University (Beijing), University of Hong Kong, Chinese University of Hong Kong, Hong Kong University of Science and Technology, University of West Florida, University of South Florida. This is the first open lecture held in Columbus, Ohio. Please pass on this information to your friends living in Central Ohio area. All are welcome. We want to request a larger room for the presentation to the largest audience possible. Please let me know of your interest, or direct your inquiry to the Institute of Chinese Studies ( easc@osu.edu ), or National East Asian Language Resource Center ( nealrc@osu.edu ) , Ohio State University.