Courier's are reaching the farthest corners of Tamriel, and beyond, inviting your nation to this Summit. The message says,
"Dear [Insert Province Name Here],
You are invited to the Tamrielic Summit, if you are receiving this message be flattered. It means that Cyrodiil sees you as a Tamrielic Power. Do not turn down this invitation or the consequences will be dire.
Sincerely,
Cyrodiil"