It always makes me ask, whenever I see a coat of arms (or a heraldry-like logo) and can tell you right away whose coat of arms (or logo) it is: Have I been doing heraldry too long?
In this instance, I was driving around the west side of Dallas, Texas, when I ended up behind a vehicle that bore a coat of arms in the rear window. And even before I got close enough to make it out in detail (or to take the photograph below), and even though the arms are in monochrome here, I thought to myself, "That's the arms of FC Barcelona." And as you can see, I was correct!
So someone is a big Barcelona fan!
According to Wikipedia, "Futbol Club Barcelona, commonly referred to as Barcelona and colloquially known as Barça, is a professional football club based in Barcelona, Catalonia, Spain, that competes in La Liga, the top flight of Spanish football."*
An here is their logo in full color:
* When I say "football", I do not mean the North American game called "football", which given its rules and the ovoid shape of its "ball" really ought to be called something else, like "handegg". Just sayin'.