In the 1960s, the archaeologist
Emmanuel Anati, among the first to systematically study the area, drew up a chronology of rock carvings. It compared the style and types of the symbols to identify possible correlations with the traditional historical periodization, from
Prehistory to the
Middle Ages. According to
Anati's research results, Val Camonica is divided into Proto-Camunian, Camunian I, II, III, IV and Post-Camunian (
Roman,
Medieval ages and recent) periods.
Epipaleolithic The earliest rock carvings date back to
epipaleolithic (or
Mesolithic, Proto-Camunian,
Neolithic During the
Neolithic period (the 5th to 1st centuries of the 4th millennium BC approximately-5500-3300 BC Similar carvings are present in the Regional Reserve of Rock Engravings of
Ceto,
Cimbergo, and
Paspardo. The pertaining to the Neolithic of the schematic anthropomorphic figures, so called "oranti" ("praying figures"), is questioned, as some scholars refer them to the Bronze Age. According to this interpretation, the only set of figures pertaining to the Neolithic, or to a Neolithic-first Copper Age phase (4th mill. BC), is constituted by the geometric patterns, which are interpreted as topographic representation of a cultivated and ploughed land. During this period, domesticated animals are encountered such as dogs, goats and bulls. Rocks were stained with celestial symbols, animals, weapons, depictions of plowing, chains of human-beings and other signs. Although the anthropomorphic figures were primitive at first, later these images were even more intense and more complicated by adding weapons, astral disks and rectangular that symbolize the world in addition to simple figures. These monuments, preserved mainly in the
Archaeological Park of National Massi Cemmo and in that of Asinino-Anvòia (
Ossimo), indicate a ritual function linked to the veneration of ancestors.
Bronze Age During the
Bronze Age (2nd millennium BC, approximately), engravings on rock outcrops took on the issue of weapons, reflecting the greater emphasis given them by the warriors in the Camunian society of the time. Continuing emphasis was given to geometric shapes (circles and variants), in continuity with engravings from earlier eras.
Iron Age The engravings of the
Iron Age (1st millennium BC) are attributed to the people of
Camunni and constitute about 70-80% of all census figures. These works manifest their ideals of heroic masculinity and superiority. Dominant themes include representations of duels and human figures, even large ones, flaunting their weapons, their muscles and their genitals. There are also figures of cabins,
labyrinths, footprints, hunting scenes and other symbols. Topographic patterns are also present, mainly in the central part of the Iron Age (6th-4th century BC), like in the famous
Bedolina Map, firstly studied by Miguel Beltrán Llorís and more recently by Cristina Turconi for the Milan University, one of the best known engraved surfaces of the Camonica Valley.
Roman Age During the Roman domination of
Val Camonica (~100 BC - ~500 AD) petroglyph activity suffered a sharp contraction, entering a phase of latency.
Medieval Age The
Middle Ages in Val Camonica marked a resumption of the rock engravery, starting from the first phase of the Medieval Ages. Many of the inscriptions during this period are
Christian symbols, such as crosses and keys, that were joined and overlapped with those considered pagan symbols, in the background, in an attempt to sacralize these places. ==Discovery and evaluation==