The Cisplatina (literally, Province of this side of the Rio de la Plata from the Brazilian perspective, c.f. Cisalpine) was a Brazilian province in existence from 1821 to 1828 created by the Luso-Brazilian annexation of the Oriental Province.
The town was founded on 12 October 1821, under the name of San Pedro del Durazno, as a homage to Brazilian Emperor Pedro I, at a time when the territory of present-day Uruguay had been annexed to Brazil as the Cisplatine Province.