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João, Duke of Viseu

Portuguese infante

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionOct 11, 2025
Entity authorityQ6028987 ↗
Source-derived summary

Infante João of Viseu (c. 1448 – 1472) was the older son of Infante Fernando, Duke of Viseu and of his wife Infanta Beatrice of Portugal.

In 1470, following his father's death, he inherited the titles of Duke of Viseu and Duke of Beja, as well as the Lordships of Covilhã and Moura.

He also became Master of the Order of Christ and of the Order of Santiago, becoming also Constable of Portugal.

In July 1472, his uncle, King Afonso V granted him the Moroccan city of Anfa (in Portuguese Anafé).

He died young and single, without issue. His brother, Infante Diogo, inherited his titles and estates.

Ancestry

See also

Duke of Beja

Duke of Viseu

Dukedoms in Portugal

External links

Genealogy of John, 3rd Duke of Viseu, in Portuguese

Bibliography

”Nobreza de Portugal e do Brasil” – Vol. II, page 409. Published by Zairol Lda., Lisbon 1989.

Editorial summary

Begin with the source’s own compact description: “João, Duke of Viseu” is portuguese infante. The dossier treats that line as a proposition to test through João, Duke and Viseu, not as a finished interpretation.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1448, 1472, 1470, 1989—that can be checked directly. The linked authority record independently contributes the date 1448-01-01. For this dossier, João, Duke and Viseu is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “portuguese infante” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

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 Oct 11, 2025. The linked authority identifier is Q6028987. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1448, 1472, 1470 and 1989.

Critical limits

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.

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Source & attribution

This entry incorporates text from “João, Duke of Viseu” 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.