Lawyers responsible for untangling the multi-million dollar estate of music superstar Prince, who died with no known will, are in court on Monday for the start of what could be a years-long dispute over his fortune.

Six siblings or half-siblings of Prince, found dead at age 57 at his home in suburban Minneapolis on April 21st, were listed as heirs in court documents filed in Carver County District Court in Chaska, Minnesota, where the hearing gets under way before Judge Kevin Eide.

The exact value of Prince’s estate has not yet been disclosed, but his music catalog alone has been estimated at over $500 million.

Source: Minnesota court to begin process of unravelling Prince’s fortune