There is no archaeological evidence at present that Old Latium hosted permanent settlements during the Bronze Age. Some very small amounts of Apennine culture pottery shards have been found in Latium, most likely belonging to transient pastoralists engaged in transhumance. It thus appears that the Latins occupied Latium Vetus not earlier than around 1000 BC. Initially, the Latin immigrants into Latium were probably concentrated in the low hills that extend from the central Apennine range into the coastal plain (much of which was then marshy and malarial, and thus uninhabitable). A notable area of early settlement were the Alban Hills, a plateau about 20 km (13 mi) SE of Rome containing a number of extinct volcanoes and 5 lakes, of which the largest are lacus Nemorensis (Lake Nemi) and lacus Tusculensis (Lake Albano). These hills provided a defensible, well-watered base. Also the hills on the site of Rome, certainly the Palatine and possibly the Capitoline and the Quirinal, hosted permanent settlements at a very early stage.