Romans 16:7 refers to the apostles Andronicus and Junia, the Apostle says they are "well known among the apostles".
Here is what the great preacher St. John Chrysostom has to say in his homilies from Romans,
"
Then another praise besides. 'Who are of note among the Apostles.' And indeed to be apostles at all is a great thing. But to be even among these of note, just consider what a great encomium this is! But they were of note owing to their works, to their achievements. Oh! How great is the devotion of this woman, that she should be even counted worthy of the appellation of apostle! But even here he does not stop, but adds another encomium besides, and says, 'Who were also in Christ before me.'" - St. John Chrysostom, Homily 31 on Romans
Chrysostom sees throughout these greetings the immense praise and honor being bestowed upon the people mentioned (the word encomium refers to a kind of speech which honors and praises another); and especially takes note of the women whom the Apostle honors here. The Apostles Andronicus and Junia, here, are likewise honored. Chrysostom takes note that here a woman is called apostle, and not only an apostle, but noteworthy, well respected and honored as one of the apostles.
I refer here to John Chrysostom's commentary simply to pre-emptively refute the possible charge that the reading of Junia as an apostle is somehow a "modern" thing; her apostleship is well known in antiquity.
-CryptoLutheran