Indro Montanelli, who died in 2001, acknowledged having had a 12-year-old Eritrean bride while stationed in the Italian colony in the 1930s.
The statue was daubed with red paint to protest the ex-king's role in the colonisation of what is now the Democratic Republic of Congo.
"What I'm saying to people who want to protest in central London is please don't, because you're in danger of falling into a trap laid by the extreme far right, who want to provoke hatred and division," London Mayor Sadiq Khan tells Euronews.
"My ancestors had to face the slavers and fight. I think I can face the evil face of a statue and fight," Scotland's first black professor, Sir Geoff Palmer, told Euronews.
'The ghost of the past, the colonial past, is still haunting these spaces,' said one historian, speaking of the controversial statues under attack in parts of Europe.
This event draws attention to both the impact of the coronavirus outbreak on the cultural scene and the need to follow health advice.
It was created by sculptor Gottfried Kruger.
Several Christopher Columbus statues were vandalised with red paint and messages against the 15th-century Italian navigator on Monday when the US holiday named after one of the first Europeans to reach the Americas was being celebrated.
About 180 priests and worshippers then climbed onto the statue to clean and polish it, using brooms and dusters.
Two Spanish artists are selling a statue of the king of Spain but you can only keep it for a year and then you have to burn it.
A statue of an owl in the northern Serbian town of Kikinda has come under fire from locals, who think it looks like a phallus.
The Statue of Unity is double the size of the Statue of Liberty and stands at 182 metres tall.
The statue was removed on Wednesday, with authorities saying it had become a security risk.
In 1863, the great statue of Nike was discovered at the temple complex which is the Sanctuary of the Great Gods and is now on show at the Louvre museum in Paris. A replica is being made from marble and will be erected this summer on the northern Aegean island