<human>:  Who is the founder of Ashtanga yoga?
<bot>: Ashtanga yoga was founded by Pattabhi Jois in the 20th century. Pattabhi Jois was a Sri Lankan born yoga master who moved to Mysore, India in the 1940s. Pattabhi Jois created Ashtanga yoga as a series of 26 poses, which he taught to his students.