Cerovlje (croat.) or Cerreto (ital.) is both a village and the surrounding municipality (group of villages gathered together for governmental purposes); it is at the centre of the northern boundary of the croatian part of the Istrian peninsula. North of it is the slovenian part of the Istrian peninsula.
Many ancient towns and decayed castles (Belaj, Posert, Paz, Gologorica-Moncalvo, Gradinje) can be found in its territory. Almost every town or castle in Cerovlje is on top of a hill, from where they could see enemies from a farther distance. During the Middle Ages (under the reign of the Holy Roman Empire), the people of Cerretto also built many churches.