The 38-year-old goalkeeper saw the curtain come down on his Magpies career as he made his 199th appearance for the club in Sunday's 1-0 Barclays Premier League defeat by Arsenal.
Harper's relative lack of action over two decades is due in part to the brilliance of Shay Given and Tim Krul, but their loyal deputy can count Champions League football and an FA Cup final start amongst his achievements.
He will look on from afar next season as he enters a new phase of his career, and the club which has become a huge part of his life will never be far from his thoughts.
Harper said: "Wouldn't it be typical if they go and win something after my 20 years here?
"But I'll be there cheering them on - provided I'm not playing against them, obviously.
"It would be fantastic. All this club needs now is a trophy and it would be an amazing day - and one where I would be there in amongst it celebrating."
- Sports & Recreation
- Tim Krul