From the founding of the Virreinato de la Plata in the XVI century to the Argentina Independence in 1815 ? the founders of Argentinian cities and Urban Designers where Spanish architects and Urban specialists . The Colonies inherited the Language , Law, Administration system, Religion , etc. All cities like Cordoba where sister cities of the Spanish ones..!
No one is surprised that the USA once a British Colony inherited the Law, Religion?, Language, and Urban design, in New England ? (New York).
The most important legacy of Spain to the Colonies are the Genes , creating a new race Mestizos. The British Colonists Didn't spread their genes with local women. Namely in Australia, India, South Africa or the USA.
I had the opportunity to live in Madrid many years ago and Drove many times to Malaga and Marbella , before the major highways were completed?
One had to traverse many small towns where ladies in black with scarfs sat in front of their whitewashed homes..! Andalucia mostly built by the Arabs for Eight Centuries, certainly has a typical Moorish architecture, different from the older villages dating from the visigoth cities.