The Portuguese, being able to advance without resistance in the sparsely populated territory, founded the city Colonia del Sacramento on the banks of Rio de la Plata, across from Buenos Aires, in 1680.
Ever since colonial times, Portugal has had interests in the Río de la Plata region; its relationship with the Banda Oriental began in 1680, when Colonia del Sacramento was established.
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In a February 1920 attempt to swim from Colonia, Uruguay across the River Plate to Buenos Aires, Tirabocchi set a record by being in the water for 24 hours and 2 minutes, breaking the record set by Thomas William Burgess in his 1911 Channel swim of 22 hours and 35 minutes.
In 1750, he signed the agreement between Spain and Portugal that finished the disputes over the borders of Río de la Plata and Brazil; Colonia del Sacramento returned to Spain in exchange of some Paraguayan territories.