What kind of people were those who created mathematics, from the ancient Greeks to Poincare? With an emphasis on the personalities of these great mathematicians, with vivid references to the spirit of each era and the social, political, philosophical, or religious framework in which the great mathematical ideas were born and developed, sometimes with encouragement, but more often with hostility or narrow-mindedness of this social environment, the book presents, in the form of a fictional biography, with a lot of humor, sarcasm often, but always with the author's sparkling spirit, the achievements of mathematical science. The great mathematicians have played a role in the evolution of science comparable to that played by philosophers and natural scientists. However, the basic ideas on which mathematics is woven are simple, beautiful, and within the framework of understanding of every person who possesses an average intelligence. Through this pleasant and intellectual book, the reader will gain valuable knowledge, but also a unique experience of how the sciences evolve, with a focus on the lives of their creators.