Who refounded Buenos Aires in 1580?

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Panoramic aerial view of Buenos Aires, Argentina, featuring the Obelisk monument, wide avenues lined with trees, and dense city buildings under a blue sky. — Buenos Aires Aerial view of the city center, including the obelisk (center), Buenos Aires.

Buenos Aires was refounded in 1580 by Juan de Garay, who led an expedition from Asunción to the site at the mouth of the Riachuelo River. Upon this second founding, he named the city Ciudad de Trinidad ("City of Trinidad").12