Wizard Flags

[Sarah Bennet]

Hello!

Is anyone aware of a wizard flag in the HP books?  I am helping my 
cousins with a school project in which they have to design their own 
Hogwarts flag or Quidditch flag.  They can combine elements from each 
house or keep it specific to a particular house or team.  This has 
led me to wonder if there is an actual wizard flag in the canon.  

Maybe a banner or emblem of the MoM, or something like that.  I 
haven't come across it in the books but it's possible I could have 
missed it.  

I wonder what would the wizard flag would look like?  Maybe depicting 
shooting stars, or wands shooting out stars or parading owls.  I 
picture an array of pale gold stars against a shimmery midnight blue 
background, or something else appropriately magical.

Any thoughts?