The eagle is the Eagle of the Holy Roman Empire (the bishops of Geneva were Princes https://www.pnhwx.co.uk Of The Empire, once upon a time) and the Key is one of https://www.rmwx.co.uk/Collection/rm-12/ the Keys Of Heaven held by St. https://www.brwx.co.uk/Collection/professional/ Peter. The full coat of arms includes, below the shield, the words, "Post Tenebras Lux" (after darkness, light) which was the motto of the Protestant Reformation.