Categories: History of Argentina | Buenos Aires | Spanish colonization of the Americas | 1487 births | 1537 deaths
Pedro de Mendoza (1487–1537) was a Spanish conquistador, and the first adelantado of the Río de la Plata.
He founded Buenos Aires in February 2, 1536. Leaving Juan de Ayolas in charge, he sailed back to Spain in 1537 but died before arriving.