23 BC

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Millennium: 1st millennium BC
Centuries: 2nd century BC1st century BC1st century
Decades: 50s BC  40s BC  30s BC  – 20s BC –  10s BC  0s BC  0s
Years: 26 BC 25 BC 24 BC23 BC22 BC 21 BC 20 BC
23 BC in other calendars
Gregorian calendar 23 BC
Ab urbe condita 731
Ancient Greek era 189th Olympiad, year 2
Assyrian calendar 4728
Bengali calendar −615
Berber calendar 928
Buddhist calendar 522
Burmese calendar −660
Byzantine calendar 5486–5487
Chinese calendar 丁酉(Fire Rooster)
2674 or 2614
    — to —
戊戌年 (Earth Dog)
2675 or 2615
Coptic calendar −306 – −305
Discordian calendar 1144
Ethiopian calendar −30 – −29
Hebrew calendar 3738–3739
Hindu calendars
 - Vikram Samvat 34–35
 - Shaka Samvat N/A
 - Kali Yuga 3079–3080
Holocene calendar 9978
Iranian calendar 644 BP – 643 BP
Islamic calendar 664 BH – 663 BH
Julian calendar 23 BC
Korean calendar 2311
Minguo calendar 1934 before ROC
Seleucid era 289/290 AG
Thai solar calendar 520–521

Year 23 BC was either a common year starting on Saturday or Sunday or a leap year starting on Friday, Saturday or Sunday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a common year starting on Friday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Varro (or, less frequently, year 731 Ab urbe condita). The denomination 23 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.


By place[edit]

Roman Empire[edit]


By topic[edit]


  • The Roman writer, architect and engineer Vitruvius finishes writing De Architectura (known today as The Ten Books of Architecture), a treatise in Latin on architecture, and perhaps the first work about this discipline.


  • The Roman poet Horace publishes the first three books of Odes.