About the book: 2021 / This book will tell about the twenty most famous people in history, whose activities contributed to universal development and enlightenment. Which ancient scientist made the most important discovery while visiting a bathhouse? Who cured humanity from constant epidemics by laying the foundations for vaccination? Which architect's seven buildings are included in the UNESCO World Heritage List? The encyclopedia will answer these and many other questions about famous inventors, government reformers, naturalists, artists.