When the
Aragonese conquered
Cagliari,
Sardinia, from the
Pisans in 1324, they established their headquarters on top of a hill that overlooked the city. The hill was known to them as
Buen Ayre (or "Bonaria" in
Sardinian language), as it was free of the foul smell prevalent in the old city (the Castle area), which is adjacent to
swampland. "Foul smell" is another word for malaria ("mal aria" = bad air), since at that time people believed the air to cause the illness. Swamps are the breeding ground of
Anopheles mosquitoes, the vectors of malaria which had been plaguing Sardinia since the Phoencian first arrived, until the swamps were drained and treated with DDT in the 20th century. During the siege of Cagliari, the Aragonese built a sanctuary to the
Virgin Mary on top of the hill. In 1335, King
Alfonso the Gentle donated the church to the
Mercedarians, who built an
abbey that stands to this day. In the years after that, a story circulated, claiming that a statue of the Virgin Mary was retrieved from the sea after it miraculously helped to calm a storm in the
Mediterranean Sea. The statue was placed in the abbey. Spanish sailors, especially
Andalusians, venerated this image and frequently invoked the "Fair Winds" to aid them in their
navigation and prevent
shipwrecks. A sanctuary to the Virgin of Buen Ayre would be later erected in
Seville In 1536, Spanish seaman
Pedro de Mendoza established a fort and port in current-day
San Telmo (about one kilometre south of the current Buenos Aires city centre) and called it
Santa María del Buen Aire ("Saint Mary of the Good Air"). The city name was chosen by the chaplain of Mendoza's expedition, a devotee of the Virgin of Buen Ayre. (Another version [http://www.genealogiadelujan.com.ar/CRONICAS/gribeo.html says that one Leonardo Gribeo, who had witnessed the original miracle, was on Mendoza's crew.) The naming of Buenos Aires after the Sardinian virgin also refers to it lying immediately beyond the southern limit of the South-American range of Anopheles species: therefore, Buenos Aires was one of the first malaria-free ports for ships coming from the north. Mendoza's settlement soon came under attack by indigenous peoples, and was abandoned in 1541. A second (and permanent) settlement was established in 1580 by
Juan de Garay, who sailed down the
Paraná River from
Asunción (now the capital of
Paraguay). Garay preserved the name chosen by Mendoza, calling the city
Ciudad de la Santísima Trinidad y Puerto de Nuestra Señora la Virgen María de los Buenos Aires ("City of the Most Holy Trinity and Port of Our Lady the Virgin Mary of the Good Airs"). The short form "Buenos Aires" became the common usage during the 17th century. ==Demonyms==