endIndex: (CNN) -- Just seeing Princes William and Harry in the same space is rare enough these days, let alone at an event they organized together. But that's where we found ourselves Thursday -- at the unveiling of the statue of Diana, Princess of Wales. The two were intimately involved in the design of the long-awaited artwork and the redesign of the Sunken Garden around it. According to Kensington Palace, this was one of Diana's "favourite locations" and it's where the young princes played growing up. The poignancy and nostalgia of the moment weren't lost on anyone. For the first time since Harry left Kensington Palace to set up his own household with Meghan, the brothers issued a joint statement: "Today, on what would have been our Mother's 60th birthday, we remember her love, strength and character -- qualities that made her a force for good around the world, changing countless lives for the better.