Italy was preparing to bid farewell to deceased former Prime Minister Silvio Berlusconi in a grand funeral on Wednesday.

Berlusconi, a scandal-prone billionaire, dominated the country's politics, business and football world for at least three decades.

He died Monday aged 86, three days after his readmission to the San Raffaele hospital in Milan, and two months after it was revealed he had long been suffering from leukemia.

"Italy without Berlusconi," the country's largest circulation newspaper, Corriere della Sera, wrote on its front page, dedicating more than 30 pages of coverage to the event.

No official cause of death was given, but Corriere, which broke the news of Berlusconi's passing, said he had died from leukemia, with a sudden deterioration in his condition overnight into Monday.

As well as being Italy's prime minister four times, Berlusconi owned a business empire including the MFE media group, and football clubs AC Milan from 1986-2017 and AC Monza from 2018.

Corriere said Berlusconi had been well enough to watch on television Saturday's Champions League football final between Inter Milan and Manchester City.

Prime Minister Giorgia Meloni said in a TV interview Monday that she had spoken "at length" with him that day.

Family and close friends were paying their respects at a private wake in his villa ahead of a Wednesday state funeral at Milan's cathedral, likely to attract tens of thousands of people.

Foreign Minister Antonio Tajani, who cut short a visit to Washington, was among those expected to pay his respects. Tajani is the deputy leader of Berlusconi's Forza Italia, a party that is now at risk of imploding.

"I wish Forza Italia can have a future, but frankly I don't see one," Former Minister and party member Giuliano Urbani told La Repubblica daily, stating that most of its voters had already switched allegiance to Meloni's Brothers of Italy party.

Meloni and President Sergio Mattarella were among those set to attend the funeral which will take place on a national day of mourning, with flags flying at half-mast from all public buildings.

President Erdoğan sends condolences

Meanwhile, Turkish President Recep Tayyip Erdoğan expressed his condolences on Berlusconi's death.

President Erdoğan conveyed his condolences to the Italian people through a social media post.

In the message written in Turkish and Italian, President Erdoğan wrote: "I was deeply saddened by the passing of Silvio Berlusconi, the former Prime Minister of Italy, whom I have worked with for many years and whom I consider a dear friend."

"I sincerely share the grief of Mr. Berlusconi's family and loved ones, and I extend my condolences to the entire Italian people," he added.