Queen Elizabeth II planted a tree at the Upper Barrakka Gardens in Valletta during an overnight stay on the island that coincided with her diamond wedding anniversary.
She arriving with her husband, the Duke of Edinburgh, on a stopover en route to Uganda, where she is paying a state visit to inaugurate the Commonwealth Heads of Government Meeting.
Hundreds of Maltese and tourists lined Glormu Cassar Avenue in Floriana and applauded as the royal couple was driven past on their way to the Upper Barrakka Gardens at about 5 p.m.
There they met 30 couples who were celebrating their 60th year of married life, as well as those halfway there and others due to get married next week.
Following a brief tour, the royal couple planted a tree in the gardens, whose plaque refers to the Queen's diamond wedding anniversary. Their next stop during the 12-hour visit was San Anton Palace in Attard where they were to spend the evening before they left Malta.