In Rome's early semi-legendary history, the Crustumini were amongst the peoples which attended Romulus' festival of Neptune Equester. At that festival, the Roman men seized the young women amongst the visiting spectators, an event known as the Rape of the Sabine Women. Afterwards, according to Livy, the Crustumini commenced hostilities. The Romans retaliated and captured Crustumerium. A Roman colony was subsequently sent to the town by Romulus and many citizens of the town migrated to Rome. More of the Roman colonists preferred to go to Crustumerium than to another town, Antemnae, because of the fertility of the soil at the former.
According to Livy, the town later revolted to become part of the Latin League, which went to war with Rome during the reign of Rome's king Lucius Tarquinius Priscus. Crustumerium was one of a number of towns captured by Tarquinius.
It was conquered in 500 BC according to Livy (ii. 19), the tribus Crustumina or Clustumina being formed in 471 BC.
Pliny mentions it among the lost cities of Latium, but the name clung to the district, the fertility of which remained famous. The site of Crustumerium has been identified in the locality Marcigliana Vecchia, north to modern Rome along the Via Salaria, not far from Settebagni; only partially excavated, it covered an area of some 60 hectares.
Since the site of the city was identified in the 1970s, an archaeological project has been undertaken. In 2010 the Groningen Institute of Archaeology (GIA) received funding of the Netherlands Organization for Scientific Research (NWO) to elaborate their research on the Iron Age settlement of Crustumerium. The aim of this website is to provide you with information on this project called "The People and the State. Material culture, social structure and political centralization in central Italy (800 - 450 BC)". 
Notes and references
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Crustumerium". Encyclopædia Britannica (11th ed.). Cambridge University Press.