# What was lost, and how to know?

**What was lost, and how would we know?**

Knowledge that was never copied leaves little trace. Gaps in what survives are hard to see, and every period has some.

Connects to:
- [Writing](https://mapideas.org/i/hi_writing)
- [Sources and voices](https://mapideas.org/i/hi_sources)
- [Translation and the House of Wisdom](https://mapideas.org/i/hi_wisdom)

Sources:
- [Wikipedia: Lost literature](https://en.wikipedia.org/wiki/Lost_literature)

Source: https://mapideas.org/i/q_hist_lost · open on the map: https://mapideas.org/#q_hist_lost