Actually Catholic Marian devotion is one of the many distinctive Catholic teachings that are not manifest in the only wholly inspired substantive authoritative record of what the NT church believed (which is Scripture, in particular Acts through Revelation, which best shows how the NT church understood the gospels).
which best shows how the NT church understood the gospels).
...................................
Interesting! So where exactly was this NT church located? And who exactly were its leaders? And which are the documents wherein these leaders set forth their teachings about the gospels? And, since generalized statements are usually mere conjecture, if you can, please provide specific and verifiable answers, i.e., names, locations, documents, dates, etc.