Union of Transylvania with Romania
1918 unification of the Kingdom of Romania with the region of Transylvania

The union of Transylvania with Romania was declared on 1 December [O.S. 18 November] 1918 by the assembly of the delegates of ethnic Romanians held in Alba Iulia. Great Union Day, also called Unification Day, is a national holiday in Romania celebrated on 1 December. The holiday was established after the Romanian Revolution, and celebrates the unification not only of Transylvania, but also of Bessarabia and Bukovina and parts of Banat, Crișana and Maramureș with the Kingdom of Romania. Bessarabia and Bukovina had joined with the Kingdom of Romania earlier in 1918.
“Union of Transylvania with Romania” enters the record as 1918 unification of the Kingdom of Romania with the region of Transylvania. Crown Archives preserves that source wording while asking what Union, Transylvania and Romania can confirm, complicate or overturn.
Why this record matters
“Union of Transylvania with Romania” is worth following because a concise public description often conceals a longer documentary argument. Here, Union, Transylvania and Romania 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 Sep 16, 2026. The first chronological checks are 1918.
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.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Union of Transylvania with Romania”, its source revision and the description used here.
- Expand the search: follow Union of Transylvania with Romania primary sources, Union of Transylvania with Romania archive and Union research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Union of Transylvania with Romania”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Union of Transylvania with Romania” 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.