"I am delighted to be here and I cannot wait to start playing," he revealed.
"The Pugliesi made a great effort to sign me and I am grateful to them, especially sporting director Giorgio Perinetti. In less than a week we did everything and signed the papers. I know my new boss very well and this will help me.
"Winning in the Scottish Premier League was easy - here instead every point will be hard fought. I leave some great fans but in Bari the supporters are equally good. Celtic really cared about me and their stadium is beautiful. I hope they win the title."