ante diem xii kalendas junias
- Agonalia — the rex sacrificulus would offer a ram to various deities
- rites in honour of Vediovis
- 429 B.C. — birth of Plato (by one reckoning)
- 70 A.D. — Roman forces break through Jerusalem’s middle wall
- 194 A.D.(?) — Septimius Severus acclaimed as Imperator
- 293 A.D. (?) — elevation of Galerius to the rank of Caesar by Diocletian
- 1920 — birth of John Chadwick (The Decipherment of Linear B)
- 1929 — death of Rodolfo Lanciani (perhaps May 22)
- 1953 — birth of Don Fowler

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