A Pre-Inca Stronghold
Strategically positioned on a hill 80 meters above the Río Grande, the Pucará de Tilcara was a defensive settlement constructed by the Omaguaca people around the 12th century. This location in the Quebrada de Humahuaca offered clear views and defended the only two accessible routes through the valley. At its peak, the fortress covered approximately 15 acres and housed more than 2,000 inhabitants. The residents were skilled in agriculture, pottery, and weaving, and were also known as formidable warriors.
The settlement's architecture consisted of small, square stone buildings, known as pirkas, built without mortar. These structures had low doorways and no windows, a design intended to conserve heat in the high-altitude desert climate. Roofs were constructed from a combination of cactus wood and local grass. The site was residential; it included corrals for llamas, spaces for religious ceremonies, and designated burial grounds. In the late 15th century, the Inca Empire conquered the region, using the Pucará as a military and administrative center to secure local mining resources like silver and copper. Inca dominion lasted about 50 years until the arrival of the Spanish in 1536.
A Complicated Reconstruction
The site was rediscovered in 1908 by ethnographer Juan Bautista Ambrosetti and his student, Salvador Debenedetti, from the University of Buenos Aires. Over three years of initial fieldwork, they cataloged more than 3,000 artifacts. Starting in 1911, they began clearing the site and partially rebuilding some of the stone walls. This work was continued in the 1950s under the direction of archaeologist Eduardo Casanova, with the goal of preparing the site for tourism.
This reconstruction is a point of academic discussion. The methods used in the mid-20th century do not align with modern archaeological standards, which favor preservation over recreation. The extensive rebuilding has made it difficult for contemporary researchers to study the original Incan and pre-Incan occupation layers of the site. Despite these issues, the Pucará de Tilcara is the only publicly accessible major archaeological site in the Quebrada de Humahuaca and was declared a National Monument of Argentina in 2000.