Historic Centre of Mexico City and Xochimilco

The Zócalo, the main plaza of Mexico City and the heart of the Centro Histórico

The historic center of Mexico City is also known as the "Centro" or "Centro Histórico." This neighborhood is focused on the Zócalo or main plaza in Mexico City and extends in all directions for a number of blocks with its farthest extent being west to the Alameda Central The Zocalo is the largest plaza in Latin America^[2] and the second largest in the world after Moscow's Red Square.^[3] It can hold up to nearly 100,000 people.^[4]

• http://en.wikipedia.org/wiki/Historic center of Mexico City