Year 285 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Canina and Lepidus (or, less frequently, year 469 Ab urbe condita). The denomination 285 BC 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.

Events

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By place

Egypt

• June 26 – Egypt's Ptolemy I Soter abdicates. He is succeeded by his youngest son by his wife Berenice, Ptolemy II Philadelphus, who has been co-regent for three years.
• A 110 metre tall lighthouse on the island of Pharos in Alexandria's harbour is completed and serves as 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 deserted by his troops and surrenders to Seleucus at Cilicia, where Seleucus keeps him a prisoner.

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Births

Deaths

• Dicaearchus, Greek philosopher, cartographer, geographer, mathematician and author (b. c. 350 BC)
• Theophrastus, Greek philosopher, a native of Eressos in Lesbos, the successor of Aristotle in the Peripatetic school (b. c. 370 BC)

References

ast:285 edC be:285 . . be-x-old:285 . . bs:285 p.n.e. ca:285 aC cs:285 p . n. l. cy:285 CC da:285 f.Kr. de:285 v. Chr. el:285 . . es:285 a. C. eo:-285 eu:K. a. 285 fa: ( ) fr:-285 gl:-285 ko: 285 hy: . . . 285 hr:285. pr. Kr. io:285 aK id:285 SM it:285 a.C. ka: . . 285 kk: . . . 285 sw:285 KK la:285 a.C.n. lb:-285 lt:285 m. pr. m. e. hu:I. e. 285 mk:285 . . . mr: . . . ms:285 SM nl:285 v.Chr. ne: . . new: nap:285 AC no:285 f.Kr. oc:-285 uz:Mil. av. 285 nds:285 v. Chr. pl:285 p.n.e. pt:285 a.C. ro:285 .Hr. qu:285 k ru:285 . . sq:285 p.e.s. simple:285 BC sk:285 pred Kr. sl:285 pr. n. t. sr:285. . . . sh:285. pne. su:285 SM fi:285 eaa. sv:285 f.Kr. tl:285 BC th: . . 259 uk:285 . . vec:285 a.C. war:285 UC yo:285 SK zh: 285