Treaty of London (1373)

E943024
alliance treaty bilateral treaty medieval diplomatic agreement

The Treaty of London (1373) is a medieval diplomatic agreement that established a perpetual alliance of mutual support and friendship between England and Portugal, forming the core of what is often considered the world's oldest continuous alliance.

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Statements (46)

Predicate Object
instanceOf alliance treaty ⓘ
bilateral treaty ⓘ
medieval diplomatic agreement ⓘ
aimedTo secure Portuguese independence from Castile ⓘ
strengthen England's position against France and Castile ⓘ
alsoKnownAs Anglo-Portuguese Treaty of 1373 NERFINISHED ⓘ
category 1373 in England ⓘ
1373 in Portugal ⓘ
1373 treaties ⓘ
History of Anglo-Portuguese relations ⓘ
Treaties of England NERFINISHED ⓘ
Treaties of Portugal NERFINISHED ⓘ
coreOf Anglo-Portuguese Alliance NERFINISHED ⓘ
countryInvolved Kingdom of England NERFINISHED ⓘ
Kingdom of Portugal NERFINISHED ⓘ
dateSigned 1373-06-16 ⓘ
describedAs world's oldest continuous alliance ⓘ
established mutual support and friendship between England and Portugal ⓘ
perpetual alliance between England and Portugal ⓘ
followedBy Treaty of Windsor (1386) NERFINISHED ⓘ
hasEffect enduring diplomatic ties between England and Portugal ⓘ
long-term military cooperation between England and Portugal ⓘ
historicalPeriod Late Middle Ages ⓘ
language Latin ⓘ
legalNature defensive alliance ⓘ
offensive alliance ⓘ
legalStatus in force ⓘ
obligation maintenance of peace and friendship ⓘ
mutual assistance against enemies ⓘ
mutual defense ⓘ
mutual military aid ⓘ
partOf Anglo-Portuguese treaties NERFINISHED ⓘ
party Crown of England NERFINISHED ⓘ
Crown of Portugal NERFINISHED ⓘ
placeSigned London NERFINISHED ⓘ
precededBy Treaty of Tagilde NERFINISHED ⓘ
recognizedAs foundation of Anglo-Portuguese Alliance ⓘ
relatedConflict Hundred Years' War NERFINISHED ⓘ
signatory Edward III of England NERFINISHED ⓘ
Ferdinand I of Portugal NERFINISHED ⓘ
signedUnderReignOf Edward III of England NERFINISHED ⓘ
Ferdinand I of Portugal NERFINISHED ⓘ
statedDuration perpetual ⓘ
subject Anglo-Portuguese relations ⓘ
medieval international law ⓘ
yearSigned 1373 ⓘ

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Anglo-Portuguese Alliance → hasPart → Treaty of London (1373) ⓘ
Anglo-Portuguese Alliance → legalBasis → Treaty of London (1373) ⓘ