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|234 by topic|
|Ab urbe condita||987|
|Balinese saka calendar||155–156|
|Chinese calendar||癸丑年 (Water Ox)
2930 or 2870
— to —
甲寅年 (Wood Tiger)
2931 or 2871
|Coptic calendar||−50 – −49|
|- Vikram Samvat||290–291|
|- Shaka Samvat||155–156|
|- Kali Yuga||3334–3335|
|Iranian calendar||388 BP – 387 BP|
|Islamic calendar||400 BH – 399 BH|
|Minguo calendar||1678 before ROC
|Seleucid era||545/546 AG|
|Thai solar calendar||776–777|
360 or −21 or −793
— to —
361 or −20 or −792
|Wikimedia Commons has media related to 234.|
Year 234 (CCXXXIV) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Pupienus and Sulla (or, less frequently, year 987 Ab urbe condita). The denomination 234 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.
- Emperor Alexander Severus and his mother Julia Mamaea move to Moguntiacum (modern Mainz), the capital of Germania Superior. His generals have planned a military offensive and built a bridge across the Rhine. Alexander prefers to negotiate for peace by buying off the Alemanni. This policy outrages the Roman legions and he loses the trust of the troops.
- Zhuge Liang, Chancellor of Shu Han, embarks on his last Northern Expedition against Cao Wei. During the Battle of Wuzhang Plains, he falls sick and sends secret orders for his army to retreat.
- Wei Yan is executed for treason after refusing to accept orders from Zhuge Liang.
- April 21 – Emperor Xian of Han, last emperor of the Han Dynasty (b. 181)
- Li Yan, general of the Shu Kingdom
- Pan Zhang, general of Kingdom of Wu (b. 177)
- Wei Yan, Shu general (executed by Ma Dai) (b. 175)
- Xiahou Hui, noble woman and wife of Sima Shi (b. 211)
- Zhuge Liang of the Shu Kingdom in China (on the Wuzhang Plains in a battle against the Kingdom of Wei) (b. 181)