There are many, not just three; however the most important groups would be:
Nahua (descendants of the original Aztecs, found in most central Mexico)
Maya
Zapotec
Mixtec
Otomi
Totonac
The Native American, or Amerindian population ranges from 10% to 30% of the population (between 11 and 34 million in 2010) and such people are the pure descendants of Native American peoples who inhabited Mexico before the arrival of Europeans during the 16th century. Some ethnic groups including this classification are the Nahuatl, Maya, Zapotec, Mixtec, Otomi and Totonac.
The Native American, or Amerindian population ranges from 10% to 30% of the population (between 11 and 34 million in 2010) and such people are the pure descendants of Native American peoples who inhabited Mexico before the arrival of Europeans during the 16th century. Some ethnic groups including this classification are the Nahuatl, Maya, Zapotec, Mixtec, Otomi and Totonac.
The first civilization to rise in Mexico is known as the Olmec; they were found in the lowlands along the southern Gulf of Mexico since 3000 BC.
Other indigenous groups include the Teotihuacan and the Toltec, but the two civilizations that were still found in Mexico when contact with Europeans was made (1519 AD) include the Aztec and Maya.
Right now? No. In the past, Mexican society was classified on three groups: Spanish descendants, indigenous people and mixed people from white and Native American ancestry.
Mayans, Aztecs, Olmecs, Teotihuacans.
mestizos, native americans, criollos
It is a tradition held for thousands of years. Even before the Spanish came to the Americas, indigenous people honored their dead with offerings consisting of flowers and foodstuffs.
The Aztec Empire was the last empire to rule Mexico before the Spanish came.
Mexico-Tenochtitlan
Mexico-Tenochtitlan
Aztec and Mayan civilizations.
A period of time before people of Spain invaded a country (e.g. Pre - Hispanic Mexico - before Spaniards arrived in Mexico.
Incan, Mayan, and Aztec Indian tribes. The eastern settelers opressed their thoughts and believed they were a superior race. They repressed any thought or religion that was established before they invaded.
Before the Spanish conquered Mexico, the surname "Torres" did not exist in Mexico.
The Spanish Empire
Both Native American peoples found in the Americans at the time of Mexico's conquest, as well as Spanish conquistadors who conquered and settled Mexico from 1521 until 1821, when Mexico won its independence war against Spain.
Several people have invaded and captured Mexico City in the past. Before it was even known as Mexico City, it was razed by Spanish Conquistador Hernan Cortes in 1521. Another example is American General Winfield Scott, who captured Mexico City in 1848 thus ending the Mexican-American War.
Before its independence, Mexico was considered an overseas territory of the Spanish Crown. This means that it was treated as another Spanish province, and was ruled by a Viceroy, appointed by the Spanish Monarch.