On Saturday, at 3 PM London local time, Queen Elizabeth attended the funeral of her husband, Prince Philip at St. George’s Chapel at Windsor Castle. Upon her arrival at the ceremony, Queen Elizabeth could be seen wearing an all-black ensemble, coupled with a large diamond brooch.

she wore the deeply symbolic Richmond Brooch to the ceremony. The brooch, which the Queen has worn to several occasions in the past, is one of the largest in her collection, per Express, and it features a pear-shaped, pearl-drop component, but the Queen wore the brooch without that detail today.

Here’s the story behind the Richmond Brooch: Elizabeth’s grandmother, Queen Mary, was gifted the brooch, made by Hunt and Raskell, in 1893 as a wedding present. The brooch features diamonds, set with two pearls—one large round center pearl and the detachable pearl. Mary wore the broach on her honeymoon at Osborne House on Isle of Wight.

It’s very fitting that Queen Elizabeth chose to wear this particular brooch today, considering the romantic connections it has in her family and her grandparents’ own love story. Elizabeth and Philip were married on November 20, 1947 and would have celebrated their 74th wedding anniversary this year.

“He is someone who doesn’t take easily to compliments but he has, quite simply, been my strength and stay all these years, and I, and his whole family, and this and many other countries, owe him a debt greater than he would ever claim, or we shall ever know,” she said on their 50th wedding anniversary in 1997.