Prince Harry quietly paid homage to his late grandmother, Queen Elizabeth II, with a private visit to her final resting place at St. George’s Chapel in Windsor Castle.

A spokesperson confirmed that the Duke of Sussex laid a wreath of flowers at the chapel, where the Queen was buried in September 2022.

Marking the third anniversary of her death, Harry, 40, made the tribute shortly after arriving in the U.K. A source told PEOPLE that the prince is in a “positive” frame of mind. “He’s in a really good headspace and looking forward to seeing everyone from his charities and the causes he cares about,” the source shared.

Remembering Queen Elizabeth

The late monarch passed away at Balmoral Castle on September 8, 2022, at age 96. She was laid to rest beside her husband of 73 years, Prince Philip, in the King George VI Memorial Chapel at Windsor following her state funeral. The chapel also holds the remains of her parents, King George VI and the Queen Mother, as well as her sister, Princess Margaret.

For Harry, St. George’s holds personal meaning beyond his grandmother’s resting place—it was also the venue of his wedding to Meghan Markle in 2018. He previously visited the chapel in 2023 to pay his respects.