The Polish international's arrival will fuel speculation that current number one goalkeeper Sebastien Frey, who has been linked with a move to Arsenal, is heading for a summer exit.
"Goalkeeper Artur Boruc is a Fiorentina player. The deal was secured by [sporting director Pantaleo] Corvino for just under £1.7 million since his contract [was due to expire] in 2011," Sky transfer expert Gianluca Di Marzio told Radio Blu.
"He will sign a two-year contract, but his arrival, at least for the intentions of the Viola does not necessarily mean the departure of Frey."
Since moving to Celtic in 2005, the 30-year-old made over 150 league appearances for the club and became an irreplaceable member of their starting XI. He won three league titles during his time in Glasgow and also featured in the 2006 World Cup for his country.
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