What, if any, are some first-millenium mentions of prohibitions or approval of interracial or international marriages?

While in the last few centuries there have been particularly American Christians arguing against interracial/intercultural/international marriage (I believe the term is "kinism"), I do not know of this being a historical position of anyone in the church. But I may be ignorant of a long-standing doctrine in some group or from some person who holds to a similar idea. Are there any doctrinal positions on interracial marriage in, say, the first 1000-1500 years of New Testament church history?