Spanish Draft Constitution of 1856
proposed constitution of Spain

The Spanish Constitution of 1856, also known as the "unborn (non nata)", was an unsuccessful attempt to reform the political system during the reign of Isabella II. Although it was passed by the Cortes, it was never implemented due to the "counterrevolutionary coup" of General Leopoldo O'Donnell that ended the bienio progresista.
As a consequence of enacting an illegal constitution, Queen Isabella II decreed the closure of the constituent assembly elected in 1854. The document was therefore officially declared merely a failed draft project although technically it was a valid constitution.
It is important as it collected together the ideas of progressive liberal ideology and anticipated some of the ideas developed later by the Spanish Constitution of 1869 which ended the autocratic monarchy of Isabella and put the more democratic Amadeo I of Spain on the throne.
Begin with the source’s own compact description: “Spanish Draft Constitution of 1856” is proposed constitution of Spain. The dossier treats that line as a proposition to test through Spanish, Draft and Constitution, not as a finished interpretation.
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Contemporary correspondence, administrative files and participant testimony can test how later narratives organized the event or institution. The source revision retrieved here is dated Jan 26, 2026. The linked authority identifier is Q2841552. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1856, 1854 and 1869.
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This entry incorporates text from “Spanish Draft Constitution of 1856” 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.