Hellenistic mosaics were no longer produced after roughly 69 BC, due to warfare with the Kingdom of Pontus and the subsequently abrupt decline of the island's population and position as a major trading center.
Mosaics have been found in places of worship, public buildings, and private homes, the latter usually containing either an irregular-shaped floor plan or peristyle central courtyard.
Although there are minor traces of Punic-Phoenician and Romano-Italian influence, the Delian mosaics generally conform to the major trends found in Hellenistic art.
They also bear some attributes with Greek painting traditions and often employ a similar black-background technique found in red-figure pottery of the Classical period.
Delos' commercial prosperity, construction activity, and population waned significantly after the island was assaulted by the forces of Mithridates VI of Pontus in 88 and 69 BC, during the Mithridatic Wars with Rome.
[12] The composition of the Delos mosaics and pavements include simple pebble constructions, chip-pavement made of white marble, ceramic fragments, and pieces of tesserae.
[24] The single wave pattern, a common motif in Hellenistic art, is the most predominant type of border design for mosaics at Delos and can be found at other sites such as Arsameia (albeit arranged in the opposite direction).
[27] The illusion of three-dimensional relief in the figured scenes of Delian mosaics was usually achieved by the use of polychrome, with white, black, yellow, red, blue and green hues.
[9] The three major ethnic groups of Delos included Greeks (largely of Athenian origin), Syrians/Phoenicians, and Italians/Romans, but it is very likely that many of these Italians were Italiotes, Greek-speaking natives of Magna Graecia in what is now southern Italy.
[33] The reasons for her choosing these sites in particular for investigation and comparison include their status as major maritime trading hubs as well as their relatively well-preserved ruins of urban households.
[2] She also states that only the Macedonian capital of Pella ranks as an equal in having private homes (as opposed to royal residences) decorated with elaborate wall paintings, signed mosaics, and freestanding marble sculptures.
[37] Katherine M. D. Dunbabin writes that while many Hellenistic mosaics have been found in mainland Greece, Asia Minor, and northeast Africa (i.e. Cyrene), it is only at the site of Delos where they occur in "sufficient numbers to allow general conclusions about their use and nature.
[41] Due to the similarities between the Hellenistic wall paintings at Delos and the First Style of Pompeii, Joyce contends that the differences in Delian and Pompeian mosaics are the deliberate product of artistic preference rather than the result of ignorance of each other's traditions.
[43] Complex three-dimensional figured mosaics using polychrome designs to achieve the illusion of light and shadow were not produced at Pompeii until the Pompeian Second Style of wall painting (80–20 BC) and are considered an adoption from Hellenistic art trends.
[19] Westgate affirms that Hellenistic mosaics can be divided into two broad categories: eastern and western, based on their different styles and production techniques.
[52] Similar to the majority of excavated homes of Delos, those in the Theatre Quarter feature an open courtyard without porticoes, instead of the peristyle layout with columns.
[2][54] The tesserae materials, made of glass, faience, terracotta and natural stones, are fashioned into pieces measuring roughly one millimeter square, allowing for sharp detail and an elaborate color scheme.
The other mosaics of the house fail to achieve the naturalism of finer figure scenes and motifs, but they nevertheless demonstrate an attempt at mimicking their illusionist qualities with the tesselated technique.
[57] In each corner of the square are pairs of dolphins ridden by tiny winged figures bearing the emblems of various Greek deities, namely the thyrsus, caduceus, trident, and one object that is missing due to damage.
[57] The mosaic, signed by a certain Asclepiades of Arados (in ancient Phoenicia, now western Syria), is one of only two examples from Delos that bear a signature of the original artist.