Bernard “Bernie” Sahlins, writer, director, producer, and co-founder of The Second City, passed away Sunday night.

His mark on the world of comedy is nothing short of profound. Sahlins, along with Paul Sills and Howard Alk, worked to build one of the most influential theaters in Chicago. The Second City, which opened its doors in December 1959, became famous for improvisational theater, and could arguably be considered THE training center for improv in the United States. Alumni of The Second City include famous John Belushi, Mike Myers, Bill Murray, Gilda Radner, John Candy, Tina Fey, Steve Carell, Stephen Colbert, and over many more “Saturday Night Live” stars.

Sahlins died peacefully at his Chicago home at the age of 90. He is survived by his wife, Jane Nicholl Sahlins.