Diario was first published on 23 October 1996[1] as a weekly linked to the daily newspaper l'Unità.

[2] Enrico Deaglio, Luca Formenton and Amato Mattia were the founders of the magazine.

On 8 September 2008 Massimo Rebotti, previously of Radio Popolare, became the editor-in-chief.

[1] Enzo Baldon, an Italian journalist working for the magazine was killed in Iraq in August 2004.

[3] The periodical achieved great successes with monographic issues such as ‘Memoria’ and ‘Berlusconeide’; in 2006 and 2007 it was at the centre of large-scale polemics which resulted from its investigations into the alleged rigging of the 2006 elections.