Inspiration: Double-headed eagle with coats of arms of individual states

Image: Quaterionenadler David de Negker, cut by Jost de Negker 1510, published by David de Necker (son). Double-headed eagle with coats of arms of individual states, symbol of the Holy Roman Empire (painting from 1510). Public Domain, https://commons.wikimedia.org/w/index.php?curid=393400