Belgium's King Philippe expressed deep regret yesterday for the "suffering and humiliation" inflicted on the Democratic Republic of the Congo (DRC) during its 75-year period under Belgian rule.
It is the first such expression of regret for Belgium's colonial past by a reigning monarch, the royal palace said.
It came in a letter to DRC president Felix Tshisekedi to mark the 60th anniversary of independence.
"I want to express my deepest regret for these past injuries, the pain of which is regularly revived by the discrimination that is still all too present in our societies," said the letter, which was seen by Reuters.
The DRC achieved independence in 1960 after the Central African country had been a Belgian colony for 52 years. Millions of Congolese are estimated to have died between 1885 and 1908 after King Leopold II declared it his personal property.
During Leopold's rule "acts of cruelty were committed, while the subsequent colonial period "caused suffering and humiliation", Philippe said.
Statues of Leopold have been defaced or removed in Belgium recently.
Philippe pledged to "continue to fight every form of racism" and welcomed parliament's move to launch a reconciliation commission to address racism and the country's colonial past. This process of reflection could help Belgians "finally make peace with our memories", he said.