Has the Catholic Church ever opposed interracial marriage?

A fun refutation of gay marriage supporters who say on Facebook: > Not too long ago cross-racial marriages were not allowed, supposedly by God. would be to say, well that's not my church so what do I care, they should have been Catholic to begin with. However, before I bite off more than is worth chewing and get my apologetic handed back to me in the form of an L on my forehead. Has it ever been the position of the Universal Church, (not just the Honorable Rev. Bigotus) that people from different races should not marry or that racial purity in humans is an end worth pursuing?