Mancini has revealed he was approached by "seven or eight" clubs to manage them last season.
"Last year I was close with seven or eight teams," said Mancini. "But I prefer to stay here because I work well here for the last three years.
"The next three or four years will be important for us here.
"I signed a contract for the next five years because I believe in this squad, because I can work with serious people like the owner and the chairman.
"To work with these people is fantastic. In football it is difficult to find people who work well with the manager.
"For me it is a fantastic situation. Now, I think we have time to improve and build a team."