On the northern outskirts of the city there are two Bronze Age burial mounds (barrows or dolmens), the Dólmen de Menga and the Dólmen de Viera, dating from the third millennium. They are the largest such structures in Europe. The larger one, Dólmen de Menga, is twenty-five metres in diameter and four metres high, and was built with thirty-two megaliths, the largest weighing about 180 tonnes. After completion of the chamber (which probably served as a grave for the ruling families) and the path leading into the centre, the stone structure was covered with earth and built up into the hill that exists today. When the مزار was opened and examined in the nineteenth century, archaeologists found the skeletons of several hundred people inside. The Dólmen del Romeral, which dates from about 1800, is outside the city. A large number of smaller stones were used in its construction. Los Silillos, a significant Bronze Age prehistoric village was uncovered several miles north of Antequera. From the seventh century, the region was settled by the Iberians, whose cultural and economic contacts with the فنیقی‌لرns and Greeks are demonstrated by many archaeological discoveries. In the middle of the first millennium, the Iberians mingled with wandering Celts (see Celtiberians) and with the civilization of Tartessos of southern Spain. The dolmen complex of Menga, Viera, and Romeral was inscribed as a World Heritage Site in 2016 under the name "Antequera Dolmens Site". The manifest for recognition from یونسکو (UNESCO) also includes Peña de los Enamorados (Lovers' Rock) and El Torcal.