The Royal Family welcomed Sultan Haitham bin Tarik of Oman for a state visit at Windsor Castle on October 20, and Princess Kate brought out some symbolic jewelry for the historic occasion.

Wearing a green Alexander McQueen coat that nodded to one of the colors of Oman’s flag, the Princess of Wales joined King Charles , Queen Camilla and Prince William to kick off the first Omani state visit in 44 years. She kept the green theme going with her jewelry, going for a meaningful piece from the royal vaults combined with a brand-new design.

Kate chose the Prince of Wales Feathers Brooch , a piece that “brings a real sense of royal history to Kate’s look,” says Justin Daughters, managing director at antique and vintage jeweler Berganza .

Princess Kate wears the Prince of Wales Feathers Brooch with an Alexander McQueen coat on October 20.

(Image credit: Getty Images)

"Also known as the Ladies of North Wales Brooch, it was presented to Princess Alexandra of Denmark in 1863 as a wedding gift from a committee of…