Los Adaes, Archaeological site and National Historic Landmark in Natchitoches Parish, Louisiana.

Los Adaes is an archaeological site in Natchitoches Parish, Louisiana, preserving the remains of the presidio Nuestra Señora del Pilar de los Adaes and the mission San Miguel de Cuéllar de los Adaes. The single-story wooden building on the grounds has dark brown vertical plank walls, a steep triangular gable facing the visitor, a small high window on the left wall and a doorway at ground level on the right.

The presidio Nuestra Señora del Pilar de los Adaes was built in 1721 by the Marquis de San Miguel de Aguayo, 12 miles from the French town of Natchitoches. It served as the capital of Spanish Texas until 1773, when the mission and presidio were closed and the settlers were forced to move to San Antonio.

The site became a meeting place where Spanish soldiers, French traders, and Adaes Native Americans encountered each other and conducted business. This intersection of different groups shaped daily interactions and created lasting connections between distant communities.

The site lies on Louisiana Highway 485 near Robeline, about 12 miles from Natchitoches. Visitors walk the grounds on foot, so wear sturdy shoes; summer heat and humidity are high, and there is little shade. The state historic site is open most days without an admission charge.

The settlement was so isolated from the nearest Spanish supply sources that residents were forced to trade secretly with French settlers. This commerce was officially forbidden, yet it was the only way the community could obtain essential goods.