Plaza de la Constitución, Central park in Guatemala City, Guatemala.

The Plaza de la Constitución is a central park in Zone 1 of Guatemala City, Guatemala, with a fountain at its center surrounded by green spaces and benches. The square sits directly beside the Metropolitan Cathedral and the National Palace, both of which shape the architectural backdrop of the historic center.

Established in 1776 as Plaza Mayor, the square served as a space for military exercises and public gatherings during the development of Guatemala City. Over the centuries, it remained the central site for civic ceremonies and social events.

The square hosts the Independence Day celebrations and parades on 15 September, the date in 1821 when independence was proclaimed to a crowd gathered on the Plaza de Armas. It also stages the Huelga de Dolores, the University of San Carlos students' satirical parade with comparsas and sharp criticism of the government, as well as concerts, speeches and protests.

The plaza connects directly to major attractions in Zone 1, including the Metropolitan Cathedral, the National Palace of Culture, and several museums. Visitors can explore the entire historic area on foot, as key buildings stand within close walking distance.

The square's fountain is the Fuente de Carlos III, ordered installed on the Plaza de Armas in 1779 by Brigadier José de Estechería, who had just taken charge of the Capitanía General de Guatemala. The main entrance of the National Palace facing the square marks kilometre zero of all roads in the Republic of Guatemala.