Inca road system
40,000 km of roads, built by a people without wheels or horses

The Incas tied their empire together with roughly 40,000 km of roads, with rope bridges and way stations every few kilometres. They had no wheels or horses: the roads carried runners called chasquis and llama trains.
Wikipedia (Russian) · Wikipedia (English) · 15th century
Meanwhile around the world (±25 years)
Europe
- 1429 Joan of Arc relieves Orléans — 21 years earlier
- c. 1450 Gutenberg's printing press — same year
Eastern Europe & Russia
- c. 1469 Afanasy Nikitin's journey to India — 19 years later
Middle East
- 1453 Fall of Constantinople — 3 years later
Asia
- 1446 King Sejong promulgates Hangul — 4 years earlier
Oceania
- c. 1445 Extinction of the moa — 5 years earlier
Alive at the time
- Johannes Gutenberg (aged 50)
- Mehmed II (aged 18)
- Sejong the Great (aged 53)
- Charles VII (aged 47)
- Murad II (aged 46)
- Pachacuti (aged 32)
- Louis XI (aged 27)
- Ashikaga Yoshimasa (aged 14)
- Ivan III (aged 10)
- Nezahualcoyotl (aged 48)