Lost work by Spanish playwright Lope de Vega completed by AI
The original manuscript of "La francesa Laura" ("The French Laura"), that artificial intelligence attributes to Spanish classical author Lope de Vega at the National Library of Spain, in Madrid, Spain, Jan. 31, 2023. (Reuters Photo)


A lost work by Spanish playwright Lope de Vega has been uncovered by researchers using artificial intelligence (AI) technology.

"Digital tools are powerful allies for the researcher of Spanish Golden Age theater. Without them, it would have been much more difficult – or even impossible – for ‘La francesa Laura’ to be studied as a potential work by Lope de Vega," begins a paper published on Tuesday that outlines the discovery.

The National Library said experts later confirmed that the Baroque playwright, and one of the most prominent names of the Spanish Golden Age, wrote "La francesa Laura" ("The Frenchwoman Laura") a few years before his death in 1635.

The manuscript stored in the library's archives is a copy that dates back to the late 17th century, long after the author of "Fuente Ovejuna" and "The Knight from Olmedo" had died.

Researchers from Vienna and Valladolid universities used AI to transcribe 1,300 anonymous manuscripts and books at the library, saving years of human effort, and also tried to discover their authorship by checking each work against a selection of words used by different writers.

The National Library said the words used in the text were "closely aligned with Lope's, and not with those of the other 350 playwrights who were part of the experiment."

The original manuscript of "La francesa Laura" ("The French Laura"), that artificial intelligence attributes to Spanish classical author Lope de Vega at the National Library of Spain, in Madrid, Spain, Jan. 31, 2023. (Reuters Photo)
The original manuscript of "La francesa Laura" ("The French Laura"), that artificial intelligence attributes to Spanish classical author Lope de Vega, at the National Library of Spain, in Madrid, Spain, Jan. 31, 2023. (Reuters Photo)

Experts then used traditional philological research resources to corroborate the findings.

"Frenchwoman Laura is a remarkable play, with the dramatic force expected of a mature Lope de Vega," the library said.

The plot, set in France, focuses around Laura, the daughter of the Duke of Brittany and wife to Count Arnaldo. The heir to the French throne is captivated by her, and although she rejects him, her jealous husband tries to poison her. Ultimately, Laura's righteousness is proven and honor is restored.

Gredos publishing house will release the book in Spanish in the coming months.

Lope de Vega is considered Spain's second most important author, only after Miguel de Cervantes. Besides elevating Spanish theater, he is known for his prolific writing. Overall, he published around 3,000 sonnets, three novels and around 500 plays.