Specific examples show the range of structures that may be called a rocca:
From the earliest stage, when church and rocca were the only stone structures,2 "the distinction between 'castles' and 'villages' is already one of degree rather than kind". (Ward-Perkins 1962:401). Their protective rocca has extended its name to many other small communities:
J.B. Ward-Perkins, "Etruscan Towns, Roman Roads and Medieval Villages: The Historical Geography of Southern Etruria", The Geographical Journal 128.4 (December 1962:389-404), pp. 399ff. Ward-Perkins notes the establishment of a villa of Roman pattern as late as ca 780, Pope Adrian I's recently rediscovered Domusculta Capracorum near Veii, which Ward-Perkins does not take as exceptional but as evidence "that the system of land tenure operating in the territory of Veii at the end of the eighth century was still one of villas and large, open estates on the late Roman model" (Ward-Perkins 1962:402); villages were carved out of the former estate in the tenth century. /wiki/Pope_Adrian_I ↩
Ward-Perkins 1962:401 points out that the familiar "medieval" character of surviving villages, with their cobbled streets and stone houses washed with colorful intonaco, upon examination are invariably structures built in the sixteenth century and later. ↩