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Landslide typology, geometry, chronology and causes are very important in hazard and risk assessment. We present the case study of Costesti compound landslide (Iasi County, Northeastern Romania), which was triggered in Upper Pleistocene period and evolved continuously, through the Holocene. The population settlements on this landslide are attested from the Eneolithic period, in the present day situation the lower body of the landslide supporting a part of Pietrisu village, Costesti Commune, while upstream of the main scarp a national road is crossing. The chronology of the landslide was assessed using absolute dating methods (radiocarbon and OSL) and relative archaeological dating combined with geomorphological landslide mapping. The internal structure of the landslide was assessed through ERT and shallow seismic surveys. The geology and the hydrogeology was assessed through field surveys …