What is 285 BC?
{{Year nav|-285}} __NOTOC__ Year '''285 BC''' was a year of the [[Roman calendar|pre-Julian Roman calendar]]. == Events == === By place === ==== Egypt ==== * [[June 26]] &ndash; [[Ancient Egypt|Egypt's]] [[Ptolemy I Soter]] quits ruling. He is succeeded by his youngest son by his wife [[Berenice I of Egypt|Berenice]], [[Ptolemy II Philadelphus]]. He was co-regent for three years. * A 110 metre tall [[Lighthouse of Alexandria|lighthouse on the island of Pharos]] in [[Alexandria]]'s harbour is completed. It is a landmark for ships in the eastern [[Mediterranean]]. Built by [[Sostratus of Cnidus]] for [[Ptolemy II of Egypt]], it is one of the seven wonders of the ancient world. It is a technological triumph and is the [[archetype]] of all lighthouses since. A broad spiral ramp leads to the top, where a fire burns at night. ==== Seleucid Empire ==== * [[Demetrius Poliorcetes]] is left by his troops and surrenders to [[Seleucus I Nicator|Seleucus]] at [[Cilicia]], where Seleucus keeps him a prisoner. {{births}} == Deaths == {{deaths2}} * [[Dicaearchus]], [[Ancient Greece|Greek]] philosopher, cartographer, geographer, mathematician and author (b. c. [[350 BC]]) [[Category:280s BC]]