Hugh Hefner, the founder of the Playboy Magazine empire, has passed away on September 27 due to natural causes at the age of 91.

Playboy’s current Cheif Creative Officer and son of Hefner, Christian Hefner, commented to People, “My father lived an exceptional and impactful life as a media and cultural pioneer and a leading voice behind some of the most significant social and cultural movements of our time in advocating free speech, civil rights and sexual freedom,”

May he rest in peace.