The banderas monumentales (Spanish for "monumental flags") are a collection of tall flagpoles containing large flags of Mexico located throughout Mexico. They are part of a program started in 1999 under President Ernesto Zedillo that is currently administered by the Secretariat of National Defense (Secretaría de la Defensa Nacional). The main feature of these monuments (though not the biggest, see below) is a giant Mexican flag flying off a 50-meter-high (160-ft) flagpole. The size of the flag was 14.3 by 25 metres (47 by 82 ft) and it was flown on a pole that measured 50 metres (160 ft) high. In the time after the decree was issued, many more banderas monumentales have been installed throughout the country in various sizes. Many of the locations were chosen due to significant events in Mexican history that occurred there.