XXX

there's more meaning when I see XXX now, as it is the official flag of A'dam:

Coat of arms

The coat of arms of Amsterdam is composed of three St Andrew's crosses, aligned vertically. Historians believe they represent the three dangers which have traditionally plagued the city: flood, fire, and pestilence. The city's official motto, Heldhaftig, Vastberaden, Barmhartig ("Valiant, Resolute, Merciful") which is displayed on the coat of arms, was bestowed on it by Queen Wilhelmina in 1947 in recognition of the city's bravery during World War II. The lions were added in the 16th century.