Roberto Mancini is said to have used his own money to pay for an advert in the Manchester Evening News.
Earlier this morning, pictures of the advert, which have a message from Mancini along with a picture of the Italian, the FA Cup, the Community Shield and the Premier League trophy, circulated on Twitter.
Former England cricket captain Michael Vaughan was one who tweeted a picture of the full-page spread. Click here to see Vaughan's image.
Mancini's message read: "Manchester City Supporters. 3 Unforgettable Years. You will always be in my heart. Ciao. Roberto Mancini."
The 48-year-old was dismissed earlier this week soon after the club's FA Cup final loss to Wigan Athletic.
