Prince, one of the biggest icons in pop music, known for hits such as “Purple Rain” and “Kiss” has died at age 57. A representative for the singer confirmed his death to the Associated Press.

“It is with profound sadness that I am confirming that the legendary, iconic performer, Prince Rogers Nelson, has died at his Paisley Park residence this morning at the age of 57,” his rep told Los Angeles TV station KTLA.

“Carver County Sheriff Jim Olson reports that on April 21st, 2016, at about 9:43 am, sheriff’s deputies responded to a medical call at Paisley Park Studios in Chanhassen,” the sheriff’s office wrote in a statement. “When deputies and medical personnel arrived, they found an unresponsive adult male in the elevator. First responders attempted to provide lifesaving CPR, but were unable to revive the victim. He was pronounced deceased at 10:07 am.

“The Carver County Sheriff’s Office, with the assistance of the Hennepin County Sheriff’s Office and The Midwest Medical Examiner’s Office, are continuing to investigate the circumstances surrounding his death.” Star Tribune reports that the medical examiner has scheduled an autopsy for Friday.

He’d canceled some dates of his “Piano and a Microphone” tour in early April because of the flu, TMZ previously reported. A week ago, the singer was hospitalized after his private plane made an emergency landing after a show in Moline, Illinois. Varying reports said he was suffering dehydration and was getting over the flu. He was released after three hours and flew to Minneapolis, where he was recovering at home.

Over the course of nearly four decades, Prince became an icon of artistry and individuality. Few musicians defined and redefined pop, rock, R&B, funk, soul and nearly every other musical genre imaginable like Prince, who issued his debut album in 1978.

He embraced controversy, presenting himself as an androgynous sexaholic in his album art and lyrics, and challenged conservative music ideals in his first decade on albums like 1999, Purple Rain and Sign ‘O’ the Times.

Some good news does come out of this however, as it turns out, Prince has a treasure trove of unreleased music, but a new feature in the UK’s Guardian reveals specific details about the collection. Among them: Prince has an actual physical vault in the basement of his Paisley Park estate in Minneapolis.

The Guardian’s Mobeen Azhar spoke with several longtime Prince associates. According to Susan Rogers, Prince’s former sound engineer, the vault pre-dates the release of 1984’s Purple Rain.

Whether the music contained in the vault is ever officially released remains to be seen. However, according to Leeds, Prince previously said “that one day he’d just burn everything.”

Read the full article at the Guardian’s website. A documentary by Azhar called Hunting for Prince’s Vault airs on BBC this weekend.

RIP, Prince, you will be sorely missed.