Palimpsest:
1. A manuscript, typically of papyrus or parchment, that has been written on more than once, with the earlier writing in completely scraped off or erased and often legible.
2. An object or area that has extensive evidence of or layers showing activity or use: "My skin had become a palimpsest of fleeting sensations, and each layer bore the imprint of who I was" (Paul Auster).
Learned from: The Most Scandalous Book You've Never Read, by The Crossroads Gazette.