The 91-year-old royal and her husband, Prince Philip, visited the Mayflower Primary School in Poplar, England, on Thursday.
Queen Elizabeth II is remembering the 18 children who died from the first daylight raid in London during World War I.
On Thursday, the 91-year-old royal and her husband, Prince Philip, paid tribute to those were killed when a German bomb struck the Upper North Street School in Poplar, England, on June 13, 1917.
WATCH: Queen Elizabeth Meets Victims of the Manchester Bombing Attack at a Local Hospital
The two visited the school, which is now called Mayflower Primary School, as well as All Saints Church, where community members gathered together to commemorate the tragic incident's 100th anniversary. According to a post from the royal family's official Twitter page, the funerals of 15 of the children, aged 5 to 12 years old, were held during the memorial service.
"Relatives of the children who lost their lives, as well as those who survived, are attending the service alongside local school children," another tweet read.
RELATED: Prince Harry Announces That Borough Market Is Open for Business After London Terror Attacks
Despite the somber occasion, the queen was all smiles as she made her entrance, chic in a powder blue jacket, matching pill box hat and white gloves.
While at the school, the queen and the Duke of Edinburgh signed the visitors' book, met with teachers and visited the reception class where the bomb hit exactly a century ago.
They also got to chat with some of the school children, many who appeared overjoyous to show off their WWI remembrance art projects to the royals.
WATCH: Queen Elizabeth and Prince Phillip Sport Delightful Tophats at Palace Garden Party
Earlier this month, Her Majesty hosted over 8,000 guests at her garden party at Buckingham Palace.
More on that in the video below!