Aires (English: Fair Winds),
was originally named after the Virgine de
Bonaria of Cagliari , Sardinia.
Argentines sometimes refer to the city as Capital Federal to differentiate the city from the province of the same name. In the 1994 constitution, the city was given autonomy, hence its formal name: Ciudad Autónoma de Buenos Aires.
The abbreviations Bs. As., Baires and B.A. are sometimes used, the first one mostly in writing and the latter two in everyday speech. The city is sometimes called La Reina del Plata, that is, "The Queen of the Plata" (a reference to the Plata river basin). (Credit: Wikipedia)