https://en.wikipedia.org/wiki/Flag
The flag of Denmark, the Dannebrog, is attested in 1478, and is the oldest national flag still in use.It inspired the cross design of the other Nordic countries: Norway, Sweden, Finland, Iceland, and regional Scandinavian flags for the Faroe Islands, Åland, Scania and Bornholm, as well as flags for the non-Scandinavian Shetland and Orkney.; The flag of the Netherlands is the oldest …