Huacas del Sol y de la Luna: Moche Temples Near Trujillo

The Huacas del Sol y de la Luna (Temples of the Sun and the Moon) are two vast adobe pyramids near Trujillo on the north coast of Peru. Built by the Moche civilization between about AD 100 and AD 650, they stood on either side of a town that served as the capital of the southern Moche valleys. The Huaca del Sol is the largest adobe building of the ancient Americas, while the Huaca de la Luna preserves some of the finest painted murals from pre-Columbian Peru.

Setting

The site, often called Huacas de Moche, lies on the south bank of the Moche River, about 5 kilometres south-east of central Trujillo. It sits at the foot of Cerro Blanco, a pale hill rising from the desert, which the Moche probably regarded as sacred.

The two pyramids stand roughly 500 metres apart. Between them lay a dense urban zone with streets, plazas, houses, storerooms and workshops for pottery and metal. The word huaca, from Quechua, refers to a sacred place or object, and it is used in Peru for many ancient mounds.

Huaca del Sol

The Huaca del Sol was built in several stages from millions of sun-dried mud bricks. Estimates of its original size vary, but it is usually described as having been about 340 metres long, 160 metres wide and over 40 metres high. In 1975 Charles Hastings and Michael Moseley estimated that the surviving structure alone contained some 143 million adobes.

Many bricks bear marks pressed into the clay before drying. Hastings and Moseley suggested these were makers’ marks used by different work groups, each contributing a share of bricks as a form of labour tax. The idea remains influential, though other explanations have been proposed.

The building probably served as a political and residential centre, where rulers lived, held audiences and were buried. Its scale signalled the power of the Moche elite across the surrounding valleys.

Huaca de la Luna

The Huaca de la Luna sits against the slope of Cerro Blanco. It is a complex of platforms, courtyards and enclosed rooms that was rebuilt several times. Each time, the Moche filled in the older temple and built a new, larger one on top, sealing the earlier walls inside.

This practice preserved polychrome reliefs and murals painted in red, yellow, white, black and blue. Repeated images show a fanged deity face framed by waves or serpents, often linked by scholars to the figure called Ai Apaec, a widely used but modern name. Other panels show spiders, catfish, sea creatures and mythical beings.

The north façade, uncovered in the 2000s, is especially striking. It rises in stepped registers showing warriors leading naked prisoners, dancers holding hands, a spider-like decapitator and other figures. These scenes match themes found on fine Moche pottery.

The town between the pyramids

Excavations in the plain between the two huacas have revealed a planned urban centre rather than an empty ceremonial ground. Archaeologists have mapped compounds of adobe rooms arranged along narrow streets, with kitchens, storage areas, patios and burials beneath floors.

Some compounds were workshops. Craft specialists produced fine moulded and painted ceramics, metal objects and textiles here, probably under elite sponsorship. The residents seem to have included administrators, artisans and families tied to the temple and the ruling households.

The presence of this town has changed how scholars see the Moche. It suggests a real political capital with a resident population, a court and an economy based on irrigated farming in the Moche valley, not just a pilgrimage site visited at festivals.

Sacrifice at Plaza 3A

Behind the Huaca de la Luna, in an enclosed area called Plaza 3A, the archaeologist Steve Bourget excavated the remains of some 70 men and adolescents in the 1990s. Many bore signs of violent injuries and of having been held captive before death.

Some bodies lay in layers of mud, suggesting the sacrifices took place during heavy rains of the kind brought by El Niño events. Bourget and others have argued that these killings were rituals intended to restore order when the climate turned destructive. The finds confirmed that scenes of captive sacrifice on Moche pottery reflected real practice.

Decline, destruction and excavation

Around AD 600–650 the site began to lose importance, possibly linked to environmental stress, including droughts and floods, and to political changes. Power in the Moche world shifted to other centres. A later temple, sometimes called the Huaca de la Luna’s new temple, saw continued use for a time.

The site was later visited and reused by other cultures, including the Chimú, whose capital at Chan Chan lies a few kilometres away. In 1602, Spanish colonists diverted the Moche River against the Huaca del Sol to wash away its bricks in search of buried treasure. About two-thirds of the structure was destroyed. Colonial records describe the operation as a formal mining enterprise, and looting of graves at the site continued for centuries afterwards.

The German archaeologist Max Uhle excavated at the site in 1899–1900, establishing that it was older than the Inca period. In 1991 the Huacas del Sol y de la Luna Project began under Santiago Uceda and Ricardo Morales of the Universidad Nacional de Trujillo, leading to decades of excavation and conservation.

A site museum opened in 2010, displaying pottery, metalwork and finds from the excavations. Conservation remains a challenge, since adobe and painted plaster are vulnerable to rain, salt and wind. Excavated walls are protected with roofs and drainage, and the El Niño rains of 1998 and 2017 showed how quickly unprotected areas can erode.

By the numbers

Myths and facts

Myth: The Huaca del Sol was a temple to the sun and the Huaca de la Luna a temple to the moon. Fact: The names were given long after the Moche. Their real dedications are unknown, and the Huaca del Sol may have been mainly a palace and seat of government.

Myth: The murals were painted on the outside of a single temple. Fact: Many of the best-preserved paintings belonged to older phases sealed inside later rebuilding, which is why their colours survived.

Timeline

• c. AD 100: Early building phases begin at the site.
• c. AD 100–600: Repeated rebuilding of the Huaca de la Luna; growth of the Huaca del Sol and the town.
• c. AD 600–650: The site’s importance declines.
• 1602: Spanish treasure seekers divert the Moche River against the Huaca del Sol.
• 1899–1900: Max Uhle excavates at Moche.
• 1991: The Huacas del Sol y de la Luna Project begins.
• 1990s: Steve Bourget excavates the sacrificial deposits of Plaza 3A.
• 2010: The site museum opens.

Why it matters

The Huacas del Sol y de la Luna show the Moche at the height of their power: able to organise enormous labour, create vivid religious art and conduct state rituals. Along with royal tombs such as the Lord of Sipán, they are central to understanding ancient Peru before the Inca.