|Centuries:||1st century BC – 1st century – 2nd century|
|Decades:||0s BC 0s 10s – 20s – 30s 40s 50s|
|Years:||24 25 26 – 27 – 28 29 30|
|27 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||780|
|Chinese calendar||丙戌年 (Fire Dog)
2723 or 2663
— to —
丁亥年 (Fire Pig)
2724 or 2664
|Coptic calendar||−257 – −256|
|- Vikram Samvat||83–84|
|- Shaka Samvat||N/A|
|- Kali Yuga||3128–3129|
|Iranian calendar||595 BP – 594 BP|
|Islamic calendar||613 BH – 612 BH|
|Minguo calendar||1885 before ROC
|Seleucid era||338/339 AG|
|Thai solar calendar||569–570|
Year 27 (XXVII) 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 Piso and Frugi (or, less frequently, year 780 Ab urbe condita). The denomination 27 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.
- Lucius Calpurnius Piso and Marcus Licinius Crassus Frugi become Roman consuls.
- Fire in Rome.
- A poorly built amphitheatre in Fidenae collapses, killing 20,000 of the 50,000 spectators.
- Apricots are brought to Rome from Asia.
- An Arc of Triumph is erected in Rimini, in honor of Augustus.
- Agrippa II of Judea
- Petronius, Roman writer (d. 66 AD)
- Wang Chong (Wang-Tch'oung), Chinese philosopher (d. 97)