What famous improvisational theatre began in a converted Chinese laundry in 1959 in Chicago?

The famous improvisational theatre that began in a converted Chinese laundry in 1959 in Chicago is The Second City. It was founded by Paul Sills, George Wendt, and others and has since become a renowned training ground for comedians and actors. The Second City is known for its sketch comedy and improvisation, launching the careers of many notable performers.