On April 15 2003, the Blues clinched promotion to the Premier League with a 1-0 Fratton Park win over Burnley.
Twelve days later, they defeated Rotherham, also at home, to be crowned Championship champions.
And following a final day 5-0 romp at Bradford City, Blues fans came out in their thousands on Sunday, May 11.
For that was the day an open-top bus parade was held around the city, taking the players and management from Guildhall Square to Southsea seafront.
Now you can relive those heady weeks of seemingly non-stop celebrations with this nostalgia-packed photo gallery.

9. Vincent Pericard on the lap of honour after Pompey defeated Burnley to win promotion
Picture by Mick Young Photo: -

10. Owner Milan Mandaric celebrates Pompey's win against Burnley
Picture by Mick Young Photo: -

11. From left - Milan Mandaric, Kevin Bond, Jim Smith, and Harry Redknapp
Picture by Malcolm Wells Photo: -

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