The collaboration between Centro Studi Ricerche Ligabue (Ligabue Research Centre) and Martino Zanetti began in 1998 and has resulted in the discovery of the Sipan pyramids in Peru and the excavation of an important Moche architectural complex. The complex, known as Pampa Grande and located approximately 30 km from Sipan, comprises a majestic pyramid with overlapping bodies and monumental entrance ramps. It has imposing dimensions, with the longest sides exceeding 230 metres and a height of approximately 35 metres. Thanks to this important discovery, important knowledge regarding the political and religious life of the Moche has been revealed.