All of them. Entire Mesoamerican civilizations (Aztec, Maya, Zapotec, Mixtec) were exterminated by the Spanish conquistadors; their cities destroyed and used as building materials for the newly Spanish-founded cities.
However, the most important among them was the city of Mexico-Tenochtitlan. Capital of the Aztec empire and home to 300,000 people at its peak, it was razed to the ground.
Latin America (Mexico and Central America, the Caribbean and most of South America).
Spanish conquistadors.
Because Mexico was conquered and colonised by the Spanish
Spanish did not conquered the Spanish? They conquered the Aztecs in Mexico. They wanted land and were searching for gold.
The Spanish invaded and conquered Mexico.
The Aztec Empire.
Hernán Cortés
Benito juarez
As the Spanish Empire grew, the bullfight was introduced into newly conquered countries. That is how it came to Mexico and many countries in Central and South America.
Spaniards, but they did not only "visited" Mexico, they also conquered it.
Conquered the Aztecs and founded a colony for the Spanish Crown in 1521.
Mexico, as well as most of Central America, the Caribbean and South America were conquered and settled by Spanish Conquistadors during the 15th and 16th centuries. As such, they imposed their language, culture and religion to the conquered peoples of the region, including Spanish as language, Roman Catholicism as "official" religion and Spanish traditions such as the Quinceanera, bullfighting and Christmas.