Lineages
Every great book stands on older ones. Homer gave Virgil his wanderings and his war; Virgil walked Dante through Hell. Start from a classic and follow its line, one work at a time, across the map.
What it draws on
Apuleius, AD 170*, a classic
The Golden Ass ends with its hero's conversion to the cult of Isis, told in his own voice. Augustine, who grew up in the same corner of Roman Africa as Apuleius, tells his own story of wandering and conversion, partly in answer to it.
Source: Wikipedia, The Golden Ass
“The style of autobiographical confession of suffering in The Golden Ass influenced Augustine of Hippo in the tone and style—partly in polemic—of his Confessions.” Read it there
No later work in the atlas draws on Confessions yet.