In 1579 Philip II awarded a large territory in New Spain to a Portuguese man named Luis de Carvajal. That territory included a significant portion of present day Mexico, as well as portions of Texas and New Mexico. This remarkable man discovered, conquered, and settled most of that territory. He also brought a large group of settlers from Spain and Portugal whose impact on its cultural development was very significant. Many of those settlers were of Jewish descent and some of them were tried by the Inquisition for practicing the faith of their ancestors. This book is a biography of Carvajal and is based on documents that were written during his life or soon after his death. The narrative follows him from birth to death and describes the actions he took to give rise to Nuevo Reino de Leon. These included explorations and discoveries; battles with free Indians; pacifications of Indian uprisings; and legal fights with Crown officials who were determined to eliminate him and to end his government. In the end his enemies defeated him with the help of the Inquisition, but the political entity he gave rise to did not die with him.