Druids were members of a priestly class in ancient Celtic societies, primarily in Gaul (modern-day France), Britain, and Ireland. They played a significant role in Celtic religious and social life, serving as religious leaders, scholars, judges, and advisors to tribal chiefs. The druids held extensive knowledge of Celtic mythology, history, and rituals, which was transmitted orally and not written down. They were responsible for conducting religious ceremonies, including sacrifices, and interpreting omens and divination. Druids were believed to have a close connection with nature and the spirit world, and they played an essential role in the spiritual life of their communities. Oak groves were often considered sacred spaces and served as gathering places for druidic rituals and gatherings. The druids were instrumental in preserving and transmitting Celtic cultural traditions and wisdom across generations. With the Roman conquest of Celtic territories, the influence of the druids began to decline, and their religious practices faced suppression. As a result, much of their knowledge and practices were lost, and only fragmentary information survives through the accounts of ancient historians and early Christian writers. The modern Druidry movement, also known as Neo-Druidism, emerged in the 18th and 19th centuries and sought to revive and reconstruct aspects of ancient druidic beliefs and practices. Modern Druidry incorporates elements of nature reverence, Celtic mythology, and environmental awareness. The study of druids offers insights into the religious practices and social structures of ancient Celtic societies, the role of priestly classes in pre-Christian cultures, and the enduring fascination with the wisdom and mystery associated with the druidic tradition. Today, Druidry continues to inspire spiritual seekers and individuals interested in reconnecting with Celtic heritage and the wisdom of nature-based spiritual traditions.