John I King Of PORTUGAL

Male 1358 - 1433  (75 years)


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  • Name John I King Of PORTUGAL  [1, 2, 3
    Born 11 Apr 1358  [1
    Gender Male 
    Died 14 Aug 1433  Lisbon Find all individuals with events at this location  [1
    Buried Batalha Find all individuals with events at this location  [1
    Notes 
    • Wikipedia Encyclopedia:
      Joo I, King of Portugal KG (pron. IPA /?u'?~u/), in English, John I (the Good or sometimes, the Great or even the One of Good Memory) (Lisbon, April 11, 1357 ? August 14, 1433 in Lisbon) was the 10th king of Portugal and Algarve and the first to use the title Lord of Ceuta. He was the natural son of Pedro I by a noble Galician lady called Teresa Loureno. In 1364 he was created grand-master of the Order of Aviz. He became king of Portugal and Algarve in 1385, after the 1383?1385 Crisis.

      On the death of his lawful brother Fernando in October 1383, without a male heir, strenuous efforts were made to secure the succession for princess Beatrice, his only daughter. As heiress-apparent Beatrice had been married to king John I of Castile, but the popular voice declared against an arrangement by which Portugal would virtually have become united with Castile. The 1383?1385 Crisis followed as a period of political anarchy, when no king ruled the country.

      On April 6, 1385, the council of the kingdom (cortes in Portuguese) met in Coimbra and declared Joo, then Master of Aviz, king of Portugal. This was in effect a declaration of war against Castile and its claims to the Portuguese throne. Soon after, the king of Castile invaded Portugal, with the purpose of conquering Lisbon and removing Joo I from the throne. Juan I was accompanied by French allied cavalry as English troops and generals took the side of Joo (see Hundred years war). Joo I then named Nuno Alvares Pereira, his loyal and talented supporter, general and protector of the Kingdom. The invasion was repelled during the Summer after the Battle of Atoleiros, but especially after the decisive battle of Aljubarrota (August 14, 1385), where the Castilian army was virtually annihilated. Juan I of Castile then retreated and the stability of Joo I's throne was permanently secured.

      A statue of John in the Praa da Figueira, LisbonIn 1387, Joo I married Philippa of Lancaster, daughter of John of Gaunt who had proved to be a worthy ally, consolidating the union of the Anglo-Portuguese Alliance that endures to the present day.

      After the death of Juan of Castile in 1390, without leaving issue by Beatrice, Joo I ruled in peace and pursued the economic development of the country. The only significant military action was the siege and conquest of the city of Ceuta in 1415. By this step he aimed to control navigation of the African coast. But in longer perspective, this was the first step opening the arabian world to medieval Europe, which in fact led to the age of sailing across whole world.

      Contemporaneous writers describe him as a man of wit, very keen on concentrating the power on himself, but at the same time with a benevolent and kind personality. His youth education as master of a religious order made him an unusually learned king in the Middle Ages. His love for knowledge and culture was passed to his sons: Duarte, the future king, was a poet and a writer, Pedro, the duke of Coimbra, was one of the most learned princes of his time and Prince Henry the Navigator, the duke of Viseu, started a school of navigation and invested heavily in science and development of nautical topics. In 1430, his only surviving daughter, Isabella, married Philip III, Duke of Burgundy and enjoyed an extremely refined court in his lands; she was the mother of Charles the Bold.
    Person ID I45002  Main Tree
    Last Modified 24 Apr 2018 

    Father Peter I King Of PORTUGAL,   b. 08 Apr 1320,   d. 18 Jan 1367  (Age 46 years) 
    Relationship Birth 
    Family ID F00532  Group Sheet  |  Family Chart

    Family 1 Philippa Of LANCASTER,   b. 31 Mar 1360, Leicester Find all individuals with events at this location,   d. 19 Jul 1415, Odivelas, near Lisbon Find all individuals with events at this location  (Age 55 years) 
    Married Between 02 and 11 Feb 1387  Oporto Find all individuals with events at this location  [1
    Children 
     1. John Of PORTUGAL,   b. 13 Jan 1400, Santarem Find all individuals with events at this location,   d. 18 Oct 1442, Alcacer do Sal Find all individuals with events at this location  (Age 42 years)  [Natural]
     2. Branco Of PORTUGAL,   b. 1388,   d. 1389  (Age 1 years)  [Natural]
     3. Ferdinand Of PORTUGAL,   b. 1402,   d. 1443, A hostage in Tangiers Find all individuals with events at this location  (Age 41 years)  [Natural]
     4. Alfonso Of PORTUGAL,   b. 1390,   d. 1400  (Age 10 years)  [Natural]
     5. Duarte I King Of PORTUGAL,   b. 31 Oct 1391,   d. 18 Sep 1438  (Age 46 years)  [Natural]
     6. Isabel Of PORTUGAL,   b. 1397,   d. 17 Dec 1472  (Age 75 years)  [Natural]
     7. Pedro Duke Of COIMBRA,   b. 1392,   d. 1449  (Age 57 years)  [Natural]
     8. Prince Henry The NAVIGATOR,   b. 1394,   d. 1460  (Age 66 years)  [Natural]
    Family ID F06914  Group Sheet  |  Family Chart

    Family 2 Inez PEREZ 
    Children 
     1. Beatrice Of PORTUGAL  [Natural]
    Family ID F07034  Group Sheet  |  Family Chart

  • Event Map
    Link to Google MapsDied - 14 Aug 1433 - Lisbon Link to Google Earth
    Link to Google MapsBuried - - Batalha Link to Google Earth
     = Link to Google Earth 

  • Sources 
    1. [S01910] Blood Royal, Issue of the Kings and Queens of Medieval England 1066-1399 by. T. Anna Leese.

    2. [S03581] Wikipedia Encyclopedia.

    3. [S5008] "Plantagenet Ancestry of Seventeenth-Century Colonists", David Faris, (Genealogical Publishing Co., Inc.).