Home›1777 in Portugal›First Treaty of San Ildefonso🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPortuguêsTürkçeРусский中文日本語EntityQ580765· pop 18· linked from 61 articlesFirst Treaty of San IldefonsoAlso known as The First Treaty of San Ildefonso1777 treaty between Spain and PortugalWikidata factsShow 2 more factspoint in time1777-10-01Commons categoryTreaty of San Ildefonso (1777)Sources (1)wikidata.orgvia Wikidata · CC0Available in 15 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsAzerbaijaniCatalanConnectionsSpainCountryArgentinaCountryPortugalCategories1777 in Portugal1777 in South America1777 in Spain1777 treatiesBoundary treatiesCharles III of SpainPortuguese colonization of the AmericasReal Sitio de San IldefonsoSpanish colonization of the AmericasTreaties involving territorial changesTreaties of the Kingdom of PortugalTreaties of the Spanish Empire