Cipher seals

  1. 42
  2. 69
  3. 420
  4. 690

Quiet field

669

The year was full. This aperture was quiet.

Theodore of Tarsus, a Greek-speaking scholar from Cilicia, arrived in Britain as archbishop of Canterbury in 669. That is a real movement of learning across the former Roman world. It is not promoted into the later instrument pattern.

  • Theodore of Tarsus arrives in Canterbury
  • Tang Gaozong’s court
  • Umayyad caliphate
  • Asuka / early Japanese state

The aperture

A possible EDUCATION / CONNECTION candidate, held as weak rather than forced.

Regions checked

  • Europe
  • Middle East
  • East Asia (Tang)
  • North Africa
  • South Asia

Included / excluded

  • Excluded: Theodore of Tarsus as an education-pattern hit. Independently interesting, but promoting a single appointment into the later cluster would shift the threshold.

68 | 69 | 70

Same century. Same research threshold. Matched frames. Neither pane brighter except that the middle year is the selected aperture.

668

Neighbor

Fall of Goguryeo to Tang and Silla. A neighbor year of large East Asian consequence.

669

Aperture

A possible EDUCATION / CONNECTION candidate, held as weak rather than forced.

670

Neighbor

Continuing Tang and caliphal campaigns.