|Centuries:||2nd century – 3rd century – 4th century|
|Decades:||180s 190s 200s – 210s – 220s 230s 240s|
|Years:||214 215 216 – 217 – 218 219 220|
|217 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||970|
|Bahá'í calendar||−1627 – −1626|
|English Regnal year||N/A|
|Chinese calendar||丙申年 (Fire Monkey)
2913 or 2853
— to —
丁酉年 (Fire Rooster)
2914 or 2854
|Coptic calendar||−67 – −66|
|- Vikram Samvat||273–274|
|- Shaka Samvat||139–140|
|- Kali Yuga||3318–3319|
|Igbo calendar||−783 – −782|
|Iranian calendar||405 BP – 404 BP|
|Islamic calendar||417 BH – 416 BH|
|Minguo calendar||1695 before ROC
|Thai solar calendar||760|
|Wikimedia Commons has media related to 217.|
Year 217 (CCXVII) 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 Praesens and Extricatus (or, less frequently, year 970 Ab urbe condita). The denomination 217 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.
- April 8 – Caracalla is assassinated by his soldiers near Edessa. Marcus Opellius Macrinus head of the Praetorian Guard, declares himself Roman emperor.
- Summer – Battle of Nisibis: A Roman army under command of Macrinus, is defeated in a three days battle by the Parthians at Nisibis in the province of Mesopotamia.
- King Artabanus V signs a peace treaty with Rome after he received 200 million sesterces, for the rebuilding of towns destroyed during the war in Parthia.
- Macrinus, of Mauritania, becomes the first equestrian Roman emperor.
- Empress Julia, wife of Septimius Severus and mother of Caracalla and Geta, commits suicide.
- The Colosseum is badly damaged by fire (lightning) which destroys the wooden upper levels of the amphitheater.
- December 20 – The papacy of Zephyrinus ends. Callixtus I is elected as the sixteenth pope, but is opposed by the theologian Hippolytus who accuses him of laxity and of being a Modalist, one who denies any distinction between the three persons of the Trinity.
- Hippolytus begins his "pontificate" as antipope and sets up a breakaway church for Christian followers.
- Ciriacus succeeds Philadelphus as Patriarch of Constantinople.
- Fu Xuan, Chinese poet (d. 278)
- Hua He, minister under the Kingdom of Wu (d. 279)
- Jia Chong, general of the Jin Dynasty (d. 282)
- Wang Yuanji, wife of Sima Zhao (d. 268)
- April 8 – Caracalla, Roman Emperor (assassinated) (b. 188)
- December 20 – Pope Zephyrinus
- Julia Domna, Roman Empress (suicide) (b. 170)
- Chen Lin, minister of Han Dynasty
- Lu Su, advisor to Sun Quan, sympathetic to Liu Bei (b. 172)
- Wang Can, Chinese poet, scholar, and statesman of Cao Wei (b. 177)
- Sima Lang, official of Han Dynasty (b. 171)