On April 7th, Queen Matilda participated at the Egmont Palace in Brussels in 2016 Forum for Development Cooperation of the United Nations. This meeting dealt with the theme "Rethinking Development Cooperation for the Sustainable Development Goals". Her Majesty delivered the opening speech. She was speaking as "Defender of Sustainable Development Goals of the United Nations," says the Royal House. The young Queen of 43 years together with HRH Crown Princess Victoria of Sweden, one of 17 eminent persons appointed in early 2016 year by UN Secretary General Ban Ki-Moon to contribute to the campaign to achieve these SDGs that world leaders have unanimously adopted back in September 25th 2015 in New York.

To ensure charm with its new function of "ODD Ambassador" Mathilde of Belgium had opted for a holding of the Belgian brand Natan consisting of a top neckline mustard yellow and charcoal gray ruched pencil skirt, a Diane von Furstenberg Lython clutch. But the key element of her look was undoubtedly her earrings designed by the Belgian designer jewelry Melissa Kandiyoti, these drives combined and wide golden spiral of rock crystal beads.