During his six seasons in charge of the Reds, Houllier led his team to the historic League Cup, UEFA Cup and FA Cup treble in 2000-01 and a return to the Champions League.
He would return to the dugout after recovering from life-saving surgery during the 2001-02 campaign and then delivered a second League Cup honour in 2003.
The Frenchman departed Anfield in 2004 having managed 307 competitive matches and re-established the club on the European stage.
Here are some memorable images of Houllier's time at Liverpool...