Like some sort of flag or banner or logo or something like that?
(I know there's a word for it I just can't think of it now -.-)
Look closely - there are Ionian and Noxian crests on the match poster
Garen sports the Demacian emblem on his armor.
The demacian emblem is also on the flag in Xin Zhao's spear.
Hm, I haven't seen them anywhere yet
Look around on the wikis - if they aren't there, they weren't published yet
© 2013 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.