Lao Tzu, or Laozi, who is traditionally believed to have lived in the 6th century B.C., is considered the founder of the Chinese philosophical tradition known as Taoism (or the "School of the Tao"). He is often regarded as a contemporary of the esteemed Chinese philosopher Confucius, though some legends suggest they were the same person, while others argue that Laozi predates Confucius. The origins and life of Laozi remain highly ambiguous, and even after centuries of research, very little is definitively known about him. Despite this, Laozi's teachings have been passed down through the centuries and have garnered a large following. His philosophy became particularly prominent during the Han Dynasty, though he is said to have lived during the Zhou Dynasty, the longest-lasting dynasty in ancient China. It was during the Han Dynasty that Taoism gained strong institutional and religious foundations. However, none of the early Taoist texts provide concrete details about Laozi's life. Due to the limited historical information, various speculations, confusions, and conflicts about Laozi's life and death have emerged over time. Some scholars believe that the Tao Te Ching, the religious and philosophical text attributed to Laozi, may not have been authored solely by him. Others even question his existence altogether, suggesting that "Laozi" may have been a title or term used to refer to any wise old man in ancient China who shared philosophical teachings.