Gennaro Sangiuliano resigned as culture minister on Friday after being embroiled in a scandal over an 'advisor' he had an affair with.
He said his resignation was "irrevocable" in a letter to Premier Giorgia Meloni.
Sangiuliano had been under heavy pressure to quit from the opposition after reports that influencer and businesswoman Maria Rosaria Boccia may have had access to email exchanges regarding the upcoming G7 Culture meeting. Sangiuliano, 62, admitted having a relationship with Boccia in an long interview with State broadcaster Rai on Wednesday, but denied that she had had access to classified information or that public money was spent on her.
He said Boccia had been set to be made an official advisor for major events but he "revoked her appointment" because of the relationship between them.
On that occasion he also said he had offered his resignation to Meloni over the case but she had declined.