The flag was Prince Philip’s personal royal standard flag. The design is divided into quarters, each representing a different aspect of the Duke’s life.
The top left section of the flag is golden yellow and features nine hearts and three lions, evoking the Danish coat of arms.
Across is a blue rectangle with a white cross from the national flag of Greece. These represent the Duke’s dual royal lineage from Denmark and Greece.
The bottom left quarter of Prince Philip’s flag represents the Mountbatten family, while the lower right quadrant features an illustration of a castle, representing him as Duke of Edinburgh.