Constitution Square, Montevideo
| Plaza Matriz | |
| Native name | Spanish: Plaza de la Constitución | 
|---|---|
| Location | Ciudad Vieja, Montevideo | 
| Construction | |
| Inauguration | 1726 | 
Plaza de la Constitución (Spanish for 'Constitution Square'), also known as Plaza Matriz, is the oldest city square in Montevideo, Uruguay.
Located in barrio Ciudad Vieja, since 1726 was the plaza mayor of the Fortress City of San Felipe and Santiago of Montevideo, in which it was the only open public space. It is the center of the city's historic district, and is surrounded by important buildings, such as the Metropolitan Cathedral and the Cabildo. It is, therefore, one of the most important tourist sites.