The documentary "La construcción de un imperio: Los persas" is a part of the documentary series that explores the rise and development of various empires throughout history. This specific episode focuses on the Persian Empire, delving into its history, achievements, and impact on the ancient world. The documentary likely uses a combination of historical information, expert commentary, and visual aids to bring the story of the Persian Empire to life for viewers. It provides insights into the political, social, and cultural aspects of the Persian Empire, showcasing its significance in shaping the course of history.