Out of the queen’s 12 great-grandchildren, they were the only two in attendance, according toABC News.

But what stood out most was a number of firsts for Charlotte in particular.

Charlotte paired the tights with the Girls Black Wool Coat by Ancar, Hello!

Princess of Wales with children Princess Charlotte and Prince George

noted, with black tights and Mary Janes.

Charlotte also wore jewelry for the first time in the form of a diamond horseshoe brooch.

This small, delicate brooch is believed to have been given to her by the queen (perPeople).

Princess Charlotte at Queen Elizabeth II’s funeral

Royals who aren’t in military attire are instructed to wear black morning coats, according toGood Morning America.

Unlike his uncles and great-uncles, Prince George of Wales wasn’t wearing black.

Instead, he wore a navy blue suit and tie rather than a morning coat.

William, Prince of Wales and Prince George of Wales