Lably
Skip to content

John III of Portugal

King of Portugal from 1521 to 1557

  • 15 min read
  • 9 chapters

Related on Lably

Through Holy Roman Empire

During his rule, Portuguese possessions were extended in Asia and the Americas through the Portuguese colonization of Brazil. John III's policy of reinforcing Portugal's bases in India, such as Goa, secured Portugal's monopoly over the spice trade of cloves and nutmeg from the Maluku Islands. On the eve of his death in 1557, the Portuguese Empire had a global dimension and spanned almost 4 million square kilometres (1.5 million square miles).

During his reign, the Portuguese became the first Europeans to contact Muromachi Japan. He abandoned Muslim territories in North Africa in favor of trade with India and investments in Brazil. In Europe, he improved relations with the Baltic region and the Rhineland, hoping that this would bolster Portuguese trade.

Early life

John, the eldest son of King Manuel I born from his second wife Maria of Aragon, was born in Lisbon on 6 June 1502. The event was marked by the presentation of Gil Vicente's Visitation Play or the Monologue of the Cowherd (Auto da Visitação ou Monólogo do Vaqueiro) in the queen's chamber.

The young prince was sworn heir to the throne in 1503, the year his younger sister, Isabella of Portugal, Empress Consort of the Holy Roman Empire between 1527 and 1538, was born.

John was educated by notable scholars of the time, including the astrologer Tomás de Torres, Diogo de Ortiz, Bishop of Viseu, and Luís Teixeira Lobo, one of the first Portuguese Renaissance humanists, rector of the University of Siena (1476) and Professor of Law at Ferrara (1502). He studied Latin, Greek, mathematics, and cosmography.

John's chronicler António de Castilho said that, "Dom João III faced problems easily, complementing his lack of culture with a practice formation that he always showed during his reign" (Elogio d'el rei D. João de Portugal, terceiro, do nome). In 1514 he was given his own house, and a few years later began to help his father in administrative duties.

At the age of sixteen John was chosen to marry his first cousin, the 20-year-old Eleanor of Austria, the eldest daughter of Philip the Handsome of Austria-Burgundy and Queen Joanna of Castile, but instead she married his widowed father Manuel. John took deep offence at this: his chroniclers say he became melancholic and was never quite the same. Some historians also argue this was one of the main reasons that John later became fervently religious, giving him the name of the Pious (Portuguese: o Piedoso).

Initial reign

On 19 December 1521 John was crowned king in the Church of São Domingos in Lisbon, beginning a thirty-six-year reign characterized by extensive activity in internal and overseas politics, especially in relations with other major European states. John III continued the absolutist politics of his predecessors. He called the Portuguese Cortes only three times and at great intervals: 1525 in Torres Novas, 1535 in Évora and 1544 in Almeirim. During the early part of his reign, he also tried to restructure administrative and judicial life in his realm.

The marriage of John's sister Isabella of Portugal to Holy Roman Emperor Charles V, enabled the Portuguese king to forge a stronger alliance with Spain and the Holy Roman Empire. To strengthen his ties with Austria he married his maternal first cousin Catherine of Austria, younger sister of Charles V and his erstwhile fiancée Eleanor, in the town of Crato. John and Catherine had nine children who all unfortunately died at young ages. By the time of John's death, only his grandson Sebastian was alive to inherit his crown.

Sign in to keep reading

8 more chapters are free with a Lably account.

More in Early modern