Hi Corvenus, welcome to AT!
like the infinity symbol on the two of coins, it is never ending, symbolic of the love of God for mankind if you will. Wreath shape is also very common in funeral wreaths, with the same idea, of unending love for the lost person.
You are behind the times though, there are wreaths for every season and holdiay now...get with it buddy
Now that I typed all that, I'll bet you are thinking of the one on the world card?