 With music, dance and rituals, a traditional Aztec ceremony was held in Mexico City's Ocalo Square on Monday to mark the 696th anniversary of the founding of the lost city of Tenochtitlan, the former Aztec capital that was destroyed by Spanish conquistadors. And Tenochtitlan is now the heart of the bustling and megalopolies of Mexico City, founded in 1325, and Tenochtitlan was famous for its elaborate Aztec temples and advanced canal system. Spanish conqueror Alhanan Cutters first arrived in Mexico in 1518 on a mission to explore the region's interior for Spanish colonization. And after the fall of Tenochtitlan in 1521, the residents of Tenochtitlan were reportedly forced to destroy their temples and palaces. The materials were later used to lay the foundations of modern-day Mexico City.