"A", Meyers Konversationslexikon, (various authors),
Volume 1, page 1, 1885-1890, web (Commons):
MKL-b1-p1: has "A.E.I.O.U."
on first page of entire 16-volume encyclopedia, as 3 Latin
phrases: "Austriae est imperare orbi universo" and
"Austriae est imperium orbis universi" with the German
phrase "Alles Erdreich ist Oesterreich unterthan" noted
with "Friedrich III.", plus a 3rd Latin phrase
"Austria erit in orbe ultima" with "Österreich wird bestehen bis ans Ende der Welt"
("Austria will stand until the end of the world"); note that
"Oesterreich" is "Österreich" ("Oe") with first letter "O".