Belgium's King Philippe has expressed his "deepest regrets" to the Democratic Republic of Congo for his country's colonial abuses.
The reigning monarch made the comments in a letter to President Félix Tshisekedi on the 60th anniversary of DR Congo's independence.
Belgium controlled the central African country from the 19th Century until it won its independence in 1960.
Millions of Africans died during Belgium's bloody colonial rule.
There is a renewed focus on the European nation's history after the death of George Floyd in police custody in the US and the Black Lives Matter protests that followed.
Thousands of Belgians have demonstrated in recent weeks and statues of Belgium's colonial leader King Leopold II have been vandalised. Authorities in Antwerp have removed a statue of him from a public square.
More than 10 million Africans are thought to have died during his reign. King Philippe is a descendant of the 19th Century ruler.
What did King Philippe say?
This is the first time a Belgian monarch has formally expressed remorse for what happened during the country's colonial rule. The remarks, however, fell short of an outright apology.
In a letter sent to President Tshisekedi and published in Belgian media, King Philippe praises the "privileged partnership" between the two nations now.
But he says there have been "painful episodes" in their history, including during the reign of King Leopold II - who he does not directly name - and in the 20th Century.
"I would like to express my deepest regrets for these injuries of the past, the pain of which is now revived by the discrimination still too present in our societies," King Philippe wrote.
"I will continue to fight all forms of racism. I encourage the reflection that has been initiated by our parliament so that our memory is definitively pacified."
Just like the UK, Belgium is a constitutional monarchy - meaning King Philippe's statement will have been agreed beforehand with the government of Prime Minister Sophie Wilmès.
Earlier this month King Philippe's brother, Prince Laurent, defended Leopold II.
"He never went to [DR Congo] himself," the prince said in an interview. "I do not see how he could have made people there suffer."
Prince Laurent did, however, add that whenever he met African heads of state he always apologised "for the actions Europeans have done to Africans in general".
What's the history?
In the 19th Century, European powers began seizing large swathes of Africa for colonial exploitation.
King Leopold II was granted personal control over huge areas around the Congo river basin - what would become known as the Congo Free State.
The country lasted from 1885 to 1908. During this period more than 10 million Africans are thought to have died of disease, colonial abuses, and while working on plantations for the king.
Authorities would chop off the limbs of enslaved people when they did not meet quotas of materials such as rubber demanded by the crown.
Conditions became so terrible other countries exposed and condemned the atrocities. King Leopold II gave up direct control in 1908, and Belgium formally annexed the country, renaming it the Belgian Congo.
Colonisers continued to use Africans as wage labour and tried to turn it into a "model colony". Widespread resistance eventually led to the nation winning its independence in 1960.