"The national flag of Switzerland is a red square flag with a white cross in its center. It is one of the country’s most important national symbols. The national flag is one of the most recognizable flags in the world as it closely resembles the official flag of the International Committee of the Red Cross While the Swiss Constitution of 1848 did not provide for the establishment of an official flag, Switzerland officially adopted the flag as the nation’s official flag in 1889 as a directive from theFederal Council
https://en.wikipedia.org/wiki/Federal_Council_(Switzerland)