Eh, I'm not 100% sure. We know from ancient Greece that the tales in the Odyssey and epic cycle were very well known throughout the peninsula even before writing was widespread. I would encourage you to read about oral cultures both in Europe and Africa - you'd be amazed at how sophisticated they were (still are in some places), how far they could disseminate info and who were entrusted with the telling of those tales (clue: by no means always white men).
Also, women played a big role in the early era of mass book production and printing. You've got the female Lollards, the awesome Margery Kempe, Katharina van Bora, Birgitta Boltofsdotter and loads more who achieved fame and respect in their lifetimes.
I agree that the 'white man controlled the images and stories that were disseminated' was true to an extent in western Europe but that's cos most people in those geographies were white until pretty recently. But even in western mediaeval Catholicism we've got the beautiful images and iconography of the Black Madonna haven't we!? As to Jesus, I am Eastern Orthodox and the Christ on my icons, my eucharist book and in my church is dark and swarthy. As Aristotle said, we make Gods in our own image.
I do think that times are changing - we are hearing more stories from People of Colour (see my comments on Disney, as mass market as you can get) - there's a great thread in the Reading section about novels set in the Deep South and I'm about to add to it with a list of the fantastic and award winning books which have come out in the past 30 years by Black Women about the Black Female experience in the deep south.
And, above all, even before this century, even white folks have always enjoyed stories from People of Colour - Richard the Lionheart sang Saracen ballads, the late Plantagenet court enjoyed stories and tales brought to them and sung by Turkish merchants; children have loved One Thousand and One Arabian Nights for centuries.
Even our canonical classical literature is heavily influenced by ancient Babylon (see Martin West "The East Face of Helicon" for an AWESOME, if heavy, examination of this).
Humans have always swapped and integrated art and stories from different cultures. That's why art and literature are so rich and amazing.