Santiago Ramón y Cajal (1852–1934) was the father of modern neuroscience and an exceptional artist. He devoted his life to the anatomy of the brain, the body’s most complex and mysterious organ. His superhuman feats of visualization, based on fanatically precise techniques and countless hours at the microscope, resulted in some of the most remarkable illustrations in the history of science. This selection of Cajal’s exquisite drawings of brain cells, brain regions, and neural circuits features accessible descriptive commentary, explored in the text from multiple perspectives: This book is the companion to the traveling exhibition that marked the first time that many of these works, which are housed at the Instituto Cajal in Madrid, have been seen outside of Spain. In addition to showcasing Cajal’s contributions to neuroscience and exploring his artistic roots and achievement, looks at his work in relation to contemporary neuroscience imaging, appealing to general readers and professionals alike.