27Centuries: 1st century BC - 1st century - 2nd century
- The Emperor Tiberius retires to Capri, leaving the praetorian prefect Sejanus in charge of both Rome and the Empire.
- Fire in Rome. A shoddily-built stadium in Fidenae collapses, killing 20,000 of the 50,000 spectators.
- Agrippa II of Judea.
For the number 27, see twenty-seven.