The German empire arose after the Prussian victory in the geurra against France in the war of 1870, so much that was proclaimed in the palace of Versailles. Since the end of the Holy Roman Empire, Prussia has become the most eminent Germanic state, and led the unification, that is perhaps the reason, that the Prussian flag is more consistent with the time line of the mod
"In nomine Domini"
"Ad Majorem Dei Gloriam"
"Um Deus, um rei, uma fé, uma lei"