Literature
Zelda and the Miniature City (Unaware Gts)
In the years preceding the Second Great Calamity, many more ancient and forgotten things were than just the Guardians and Divine Beasts. These relics of a bygone age were to be studied by Hyrule's scholars, but little progress was made on them before Calamity Ganon returned to wreak havoc on the world. In the century to come, these objects would pass from one set of hands to another, being traded among the general population as trinkets and baubles of some aesthetic interest; it was only after the great monster's defeat that they could once more be gathered together for the study of them.
One such relic, a stone tablet covered in ancient Hylian script, would find its way into Princess Zelda's hands soon after peace returned to the land. After translating its text, she found it told of an underground city built in the days of the First Great Calamity; a place where people would live in peace until the outside world was safe once more, or even in perpetuity should Ganon have resulted