I believe you may mean "graven" image. A graven image would refer to a carved or crafted idol, an object that a person would bow down and worship.
Where a very few people might worship the flag, the majority of people would not.
I don't think many people would refer to the flag of any nation as a graven image.
you can see an image of the flag of colombia at google or yahoo.com...
Go to Google Image search and type "Greek flag" See related link.
Manibota's flag has an image of a bison on it.
The Newbrunswick flag has an image of a boat on it.
Because the Americans placed it there as proof that they landed on the moon.However, they no longer bear the image of the US flag on them. Due to space weathering, the flags are now completely white.
The Greek flag consists of blue and white horizontal stripes. The blue symbolizes the sea and sky, while the white represents the purity and independence of the nation.
google.
You can find the Canadian flag flying outside government buildings, border crossings, Canadian embassies, and in public areas like parks and stadiums. It is also commonly seen during national holidays and celebrations across the country.
See the link below for an image. It's rather nice looking; not strange at all.
Switzerland- the Red Cross flag is the reverse image.
See Related Links, below, for an image of the Montana state flag.
Mozambique