In 1978, Conrad Black took control of Ravelston, which he transformed into a holding company which was the head of his global media empire in the 1980s and 1990s.
In 1978, Conrad Black took control with his brother of Ravelston after his father's death. Black later transformed Ravelston into a holding company which was the head of his global media empire in the 1980s and 1990s.