Legendary Chinese philosopher who is said to have lived in the 6th century BC. Depending on the transcription, the name is also written Laotse, Lao-Tse, Laudse or Lao-tzu.
Laozi is considered to be the founder of Daoism (Taoism). He is credited with the Daodejing, the main work of Daoism, which was probably written in the 4th century BC.
Read more: https://en.wikipedia.org/wiki/Laozi