What names did Pedro de Mendoza and Juan de Garay give to Buenos Aires?

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The city of Buenos Aires was founded twice, with each founder giving it a different name:

  • Pedro de Mendoza: When he first founded the settlement in 1536, he named it Nuestra Señora Santa María del Buen Aire ("Our Lady St. Mary of the Good Air").1
  • Juan de Garay: When he refounded the city in 1580, he called it Ciudad de Trinidad ("City of Trinidad").1