One is at the top of the gateway to the pyramidal mausoleum, built 4,500 years ago, and the second was found in the northeast face. The Egyptian antiquities ministry confirmed the presence of two anomalies inside the great pyramid of kiosks. However, archaeologists did not detail its nature and still have to continue studying the phenomena to better understand them. One of the anomalies has been found in the top of the gateway to the pyramidal mausoleum, built 4,500 years ago, and the second was found in the northeast face. This announcement coincides with the end of the first year of the Skin Pyramids project launched to study the interior of Egyptian pyramids with non-invasive methods, such as detection of muons, energy particles that penetrate objects, infrared thermography, or photogrammetry. The co-ordinator of Skin Pyramids said that more studies and research will be conducted to establish the nature of these anomalies and their functions and size, which have not yet been identified. In November 2015, the group of international experts detected temperature anomalies in several blocks in the tomb of kiosks, indicating that there was something behind but did not offer further information. The Great Pyramid was built during the reign of Kufu, 2,550 BC to 2,527 BC, the second Pharaoh of the Fourth Dynasty.