Pre-Inca Culture (700 - 1100 EC.) also known as "Lambayeque Culture", settled down in the north coast, Poma was its cultural center (Batán Grande), located in Lambayeque.

The nation was organized religiously, and its trace in the history gets lost associated to a great drought that lasted more than 30 years.

They had a great domain of agriculture and metallurgy. This culture is famous for the big discoveries in Batán Grande of gold objects, and evidence of arsenic-copper (alloys of several copper mixtures and arsenic that can be described as a brass type) for what is attributed to be the precursor of the brass age in the north of Peru. They produced alloys of gold, silver and arsenic-copper in unprecedented scales in the pre-Hispanic America.

Remains found in the archaeological locations have determined that this nation maintained commercial exchange with populations from Ecuador (shells and snails); Colombia (emeralds and amber) to the north; with Chile (blue stone) to the south, and seeds of gold extracted in the basin from the Marañón River to the east.

Their funerary practices were given by their great organization and distribution of mortuary offerings that include tombs in vertical wells of  20 m. depth.

Since 1987 Dr. Izumi Shimada is carrying out in this area investigations on the archaeological locations of Batán Grande, area conformed by 30 monumental mounds of adobe platforms that, according to Shimada, "are the biggest constructions in the pre-Hispanic South America."

In the excavations in the Huaca El Loro, discovered the tomb of "El Señor de Sicán" (The Lord of Sican), rich location in historical remains, ceramic and jewels.

The investigations place today Sicán, is the biggest and most important religious center in the north area of Peru.