More Info

The flag of Amsterdam is the official flag for Amsterdam, the capital city of the Netherlands. The current design of the flag depicts three Saint Andrew's Crosses and is based on the escutcheon in the coat of arms of Amsterdam. Design journalist Roman Mars declared it during a TED Talk in 2015 to be the most "badass" city flag in the world, as well as an example to others. He particularly praised the simplicity and popular appeal that led to its widespread use.

Source: Wikipedia