800–899

The 9th century

Whose working lives fell in the 9th century. Books are measured from 1800 and readers from 2015, so for this period we can say who lived then, not who was talked about then.

Lived then

The most notable people whose working lives fell in the 9th century, ranked where Wikipedia coverage and readership agree.

  1. 1Pope FormosusPope Formosus816–896 · 🇮🇹 Italy · Religious Figures1 decades
  2. 2Pope John VIIIPope John VIII820–882 · 🇮🇹 Italy · Religious Figures9 decades
  3. 3Pope Stephen VIPope Stephen VIdied 897 · 🇮🇹 Italy · Religious Figures0 decades
  4. 4Pope Leo IVPope Leo IV790–855 · 🇮🇹 Italy · Religious Figures5 decades
  5. 5Pope Paschal IPope Paschal I775–824 · 🇮🇹 Italy · Religious Figures13 decades
  6. 6Pope Boniface VIPope Boniface VIdied 896 · 🇮🇹 Italy · Religious Figures0 decades
  7. 7Pope Sergius IIIPope Sergius III860–911 · 🇮🇹 Italy · Religious Figures0 decades
  8. 8Pope Leo VPope Leo Vdied 905 · 🇮🇹 Italy · Religious Figures0 decades
  9. 9Pope Nicholas IPope Nicholas I820–867 · 🇮🇹 Italy · Religious Figures0 decades
  10. 10Pope Adrian IIIPope Adrian IIIdied 885 · 🇮🇹 Italy · Religious Figures0 decades
  11. 11Pope John XPope John X860–929 · 🇮🇹 Italy · Religious Figures0 decades
  12. 12Pope Gregory IVPope Gregory IV795–844 · 🇮🇹 Italy · Religious Figures1 decades
  13. 13Pope Adrian IIPope Adrian II792–872 · 🇮🇹 Italy · Religious Figures0 decades
  14. 14Pope Benedict IIIPope Benedict III810–858 · 🇮🇹 Italy · Religious Figures0 decades
  15. 15Pope Theodore IIPope Theodore II840–897 · 🇮🇹 Italy · Religious Figures0 decades
  16. 16Pope Sergius IIPope Sergius II790–847 · 🇮🇹 Italy · Religious Figures0 decades
  17. 17Pope RomanusPope Romanusdied 897 · 🇮🇹 Italy · Religious Figures0 decades
  18. 18Pope ValentinePope Valentine780–827 · 🇮🇹 Italy · Religious Figures0 decades
  19. 19Pope John IXPope John IX840–900 · 🇮🇹 Italy · Religious Figures0 decades
  20. 20Pope Stephen IVPope Stephen IV770–817 · 🇮🇹 Italy · Religious Figures0 decades
  21. 21Pope Marinus IPope Marinus I830–884 · 🇮🇹 Italy · Religious Figures0 decades
  22. 22Pope Stephen VPope Stephen Vdied 891 · 🇮🇹 Italy · Religious Figures0 decades
  23. 23Pope Eugene IIPope Eugene II780–827 · 🇮🇹 Italy · Religious Figures0 decades
  24. 24Pope Anastasius IIIPope Anastasius III801–913 · 🇮🇹 Italy · Religious Figures0 decades
  25. 25Ceccardus of LuniCeccardus of Luni800–860 · 🇮🇹 Italy · Religious Figuresnot measured

How this is measured

  • Placing people in time. Each person belongs to the century in which they were most active — around age 35, and never after their death.
  • Who ranks highest. Within a century, people are ranked where two independent signals agree: how many of the world’s Wikipedia language editions cover them, and how many people actually read about them. Article counts alone can be lifted by a person’s own circle; readers cannot.
  • Fame in print. The curves count how often a name appears in Google Books from 1800 to 2019, as a share of all the words printed each year, in the person’s own language wherever that corpus exists. Those decades are over, so each measurement is made once and kept.
  • What is left out. A lifetime is measured only from 1820, when there is enough print to judge; the five years after a death are skipped as obituaries; and a name shared with someone equally notable is credited to neither.