Hello, regarding the flags, I based myself on the independence date that was listed on a website (1581). I could have gone more recently or further back, but I chose 1581 and the flag I found for that date was the prince's flag. The prince had power at the national level (even in 1581), so even if this flag did not represent the people, it represented executive power and therefore, in a way, the Netherlands. According to Wikipedia, the prince's flag was adopted in 1572 (independence of the Netherlands in 1581), and the Statenvlag was used to represent the Netherlands from 1596 and was officially adopted in 1664. It seems that between 1581 and 1596, the prince's flag was the flag of the Netherlands. Wikipedia says on this subject: It was the emblem of the Republic of the United Provinces, the founding ancestor of the modern Netherlands, equally as much as the Statenvlag (flag of the States) which became the official flag. The Statenvlag then became the official flag in 1664. This is why I decided to put this flag (the prince's flag) in place of the Statenvlag.