King Willem-Alexander has apologised and requested for forgiveness over the Netherlands' historic involvement in slavery, describing it as "a crime against humanity".

The monarch was talking at an occasion to commemorate the one hundred and sixtieth anniversary of the abolition of slavery within the nation, together with its former colonies within the Caribbean.

It is a part of a wider reckoning with colonial histories within the West which have been spurred lately by the Black Lives Matter motion.

Addressing 1000's of onlookers on the nationwide slavery monument in Amsterdam's Oosterpark, Willem-Alexander mentioned: "On this day that we remember the Dutch history of slavery, I ask forgiveness for this crime against humanity."

He admitted that racism in Dutch society stays an issue, however added that "times have changed and Keti Koti... the chains have truly been broken".

"Keti Koti" are Surinamese phrases that imply the "the chain is broken". It is the title given to 1 July as a day of remembrance of slavery and celebration of freedom within the Netherlands.

The Dutch king's speech follows an identical apology made by the nation's prime minister Mark Rutte in December 2022.

Willem-Alexander referred again to this as he addressed the group, saying: "Today I stand before you. Today, as your king and as a member of the government, I make this apology myself. And I feel the weight of the words in my heart and my soul."

In December, Mr Rutte acknowledged the Dutch state bears a accountability within the Atlantic slave commerce and that it profited from it.

However, he has mentioned the federal government is not going to pay reparations, as beneficial by an advisory panel in 2021.

Willem-Alexander apologised in Indonesia in 2020 for "excessive violence" throughout Dutch colonial rule. And in the beginning of 2022, he ruled out using the royal family's golden carriage after claims a portray on it glorified the nation's colonial previous.