20s BC
decade
The 20s BC were the period 29 BC – 20 BC.
Events
29 BC
By place
Roman Republic
Octavian Caesar becomes Roman Consul for the fifth time. His partner is Sextus Appuleius. He is granted the title of imperator, and for the third time in Roman history the doors of the Temple of Janus are closed, signalling peace.
Octavian celebrates, in Rome, three triumphs on consecutive days (August 13, August 14, and August 15) to commemorate his victories in Illyricum, Actium and Egypt.
Marcus Licinius Crassus campaigns successfully in the Balkans, killing the king of the Bastarnae by his own hand, but is denied the right to dedicate the spolia opima by Octavian.
Sofia, modern day capital of Bulgaria, is conquered by the Romans and becomes known as Ulpia Serdica.
Start of the Cantabrian Wars against Roman occupation in Hispania.
Though started under the triumvirate with Mark Anthony and Marcus Lepidus, Octavian completes three projects in the Forum Romanum: Temple of the Deified Julius, the Curia, and the Chalcidicum.
Egypt
Revolt of Thebes suppressed in Egypt.
Western Han Empire
29 BC Yellow River flood
By topic
Literature
March 1 – Horace writes the ode Occidit Daci Cotisonis agmen.
“20s BC” enters the record as decade. Crown Archives preserves that source wording while asking what decade can confirm, complicate or overturn.
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“20s BC” is worth following because a concise public description often conceals a longer documentary argument. Here, decade provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 20, 2026. The linked authority identifier is Q212891. None of the 0 selected statements returned an explicit reference.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “20s BC” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.