Year 305 BC was a year of the pre-Julian Roman calendar

Roman calendar

The Roman calendar changed its form several times in the time between the founding of Rome and the fall of the Roman Empire. This article generally discusses the early Roman or pre-Julian calendars...

. At the time, it was known as the Year of the Consulship of Megellus and Augurinus (or, less frequently, year 449 Ab urbe condita

Ab urbe condita

Ab urbe condita is Latin for "from the founding of the City ", traditionally set in 753 BC. AUC is a year-numbering system used by some ancient Roman historians to identify particular Roman years...

). The denomination 305 BC for this year has been used since the early medieval period, when the Anno Domini

Anno Domini

and Before Christ are designations used to label or number years used with the Julian and Gregorian calendars....

 calendar era

Calendar era

A calendar era is the year numbering system used by a calendar. For example, the Gregorian calendar numbers its years in the Western Christian era . The instant, date, or year from which time is marked is called the epoch of the era...

 became the prevalent method in Europe for naming years.

Seleucid Empire

• Seleucus
  Seleucus I Nicator
  Seleucus I was a Macedonian officer of Alexander the Great and one of the Diadochi. In the Wars of the Diadochi that took place after Alexander's death, Seleucus established the Seleucid dynasty and the Seleucid Empire...
  
   establishes Seleucia
  Seleucia
  Seleucia was the first capital of the Seleucid Empire, and one of the great cities of antiquity standing in Mesopotamia, on the Tigris River.Seleucia may refer to:...
  
   on the Tigris River as his capital.

Syria

• Antigonus I Monophthalmus
  Antigonus I Monophthalmus
  Antigonus I Monophthalmus , son of Philip from Elimeia, was a Macedonian nobleman, general, and satrap under Alexander the Great. During his early life he served under Philip II, and he was a major figure in the Wars of the Diadochi after Alexander's death, declaring himself king in 306 BC and...
  
   sends his son Demetrius to conquer Rhodes
  Rhodes
  Rhodes is an island in Greece, located in the eastern Aegean Sea. It is the largest of the Dodecanese islands in terms of both land area and population, with a population of 117,007, and also the island group's historical capital. Administratively the island forms a separate municipality within...
  
  , which has refused him armed support against Ptolemy
  Ptolemy I Soter
  Ptolemy I Soter I , also known as Ptolemy Lagides, c. 367 BC – c. 283 BC, was a Macedonian general under Alexander the Great, who became ruler of Egypt and founder of both the Ptolemaic Kingdom and the Ptolemaic Dynasty...
  
  . He shows ingenuity in devising new siege engines in his unsuccessful attempt to reduce the city. Among his creations are a battering ram 60 metres long and requiring 1,000 men to operate it and a wheeled siege tower named "Helepolis" (or "Taker of Cities") which stands 40 metres tall and 20 metres wide and weighs 180 tons. This siege of Rhodes earns Demetrius the title Poliorcetes ("the City Besieger").

Roman Republic

• The Roman consul
  Consul
  Consul was the highest elected office of the Roman Republic and an appointive office under the Empire. The title was also used in other city states and also revived in modern states, notably in the First French Republic...
  
  s, Marcus Fulvius Curvus Paetinus and Lucius Postumius Megellus
  Lucius Postumius Megellus
  Lucius Postumius Megellus is the name of two Ancient Romans of the gens Postumia:*Lucius Postumius Megellus, son of Lucius, consul in 305 BC, 294 BC, and 291 BC;...
  
  , decisively defeat the Samnites in the Battle of Bovianum
  Battle of Bovianum
  The Battle of Bovianum was fought in 305 BC between the Romans and the Samnites.- Battle :The Romans were led by two consuls, Tiberius Minucius Augurinus and Lucius Postumius Megellus...
  
   to end the Second Samnite War.