Mosaics were one of the most refined forms of decoration in ancient Pompeii. They were used above all to embellish the floors of houses, villas and public buildings, ranging from simple geometric designs to extraordinarily complex figurative compositions. The surviving examples provide important evidence of the wealth of Pompeian society and of the strong artistic influence of the Hellenistic world.
The mosaics discovered in Pompeii date mainly from between the 2nd century BC and the 1st century AD. The simplest floors were created with relatively large tesserae arranged in geometric or decorative patterns, while the most elaborate works used extremely small pieces of stone, marble and other coloured materials to reproduce figures, animals, landscapes and scenes inspired by mythology or Greek painting.
One of the most sophisticated techniques was opus vermiculatum, in which very small tesserae were arranged closely around the outlines of figures, allowing mosaicists to reproduce subtle changes of colour, light and shadow. This technique could produce an effect remarkably close to painting and was particularly suited to elaborate figurative panels known as emblemata, often inserted into the centre of a larger floor.
The most celebrated example from Pompeii is the Alexander Mosaic, discovered in the House of the Faun in 1831. The enormous composition, measuring approximately 5.8 × 3.1 metres, depicts Alexander the Great confronting the Persian king Darius III during battle. Executed towards the end of the 2nd century BC in opus vermiculatum and composed of more than a million tesserae, it is considered one of the greatest surviving masterpieces of ancient mosaic art.
The composition is remarkable not only for its dimensions but also for the intensity of the scene. Soldiers, horses and weapons overlap in a dense battlefield, while Alexander advances towards Darius, whose chariot is turning away from the fighting. The use of perspective, reflections, expressions and movement suggests that the mosaic was inspired by an important Hellenistic painting that has not survived.
The original Alexander Mosaic was removed from the House of the Faun in the 19th century and is preserved today in the National Archaeological Museum of Naples (MANN), together with many other mosaics and objects discovered in Pompeii.
The House of the Faun contained an exceptional collection of mosaics. In addition to the Alexander Mosaic, its decoration included a Nilotic scene, marine animals, theatrical masks, garlands and other elaborate figurative compositions. The quality and variety of these works reflect the extraordinary wealth of the owners and their familiarity with the artistic culture of the eastern Mediterranean.
Another of the most famous mosaics still associated with Pompeii is the Cave Canem mosaic at the entrance to the House of the Tragic Poet. It depicts a chained black dog accompanied by the Latin inscription CAVE CANEM, meaning “Beware of the dog”. Placed directly inside the entrance, the image combined decoration with a clear warning to anyone entering the house.
Animal subjects were particularly popular in Pompeian mosaics. Dogs, birds, fish and other creatures appear both as decorative elements and as the central subjects of elaborate compositions. Marine scenes were especially suitable for floors, fountains and garden areas, while birds, fruit and theatrical masks frequently appeared in smaller decorative panels.
Mosaic decoration was not limited exclusively to floors. Pompeian houses also preserve examples associated with fountains, nymphaea and garden architecture, where coloured tesserae and glass paste could interact with water and sunlight. Particularly spectacular examples include the mosaic-covered fountains of the House of the Large Fountain and the House of the Small Fountain, as well as the extraordinary decorated columns from the Villa of the Mosaic Columns.
The subjects chosen for mosaics reveal much about the culture of Pompeii's wealthiest inhabitants. Mythological scenes and images derived from Greek art demonstrated education and status, while theatrical subjects, still lifes, animals and landscapes reflected both personal taste and the function of the rooms they decorated. Even apparently simple geometric floors formed an integral part of the architectural design of a house.
The eruption of Mount Vesuvius in AD 79 preserved many of these floors beneath volcanic material. During the excavations of Pompeii, particularly in the 18th and 19th centuries, numerous mosaics were removed from their original settings in order to protect them and include them in the royal collections in Naples.
Today, many of the most important originals from Pompeii can be seen in the Mosaic Collection of the National Archaeological Museum of Naples, which preserves one of the world's most important collections of ancient Roman mosaics. Among the works from Pompeii are the Alexander Mosaic, the Nilotic scene and other mosaics from the House of the Faun, the famous Cave Canem, the Memento mori, scenes of marine life, theatrical subjects and numerous other examples from private houses.
Visitors who explore Pompeii and then visit the museum in Naples can therefore see both sides of the same story: the houses and architectural spaces in which the mosaics were originally displayed, and many of the original works that once decorated them.
If you are planning a visit to the museum, see our guide to the National Archaeological Museum of Naples: tickets and visitor information.
Parrots and a Pigeon Drinking from a Basin, with a Cat – National Archaeological Museum of Naples
This polychrome mosaic emblem was discovered in 1855 at Santa Maria Capua Vetere, the site of ancient Capua, and is now preserved in the National Archaeological Museum of Naples (Inv. 9992). On stylistic grounds, it is generally dated to around 80–60 BC.
The composition shows two parrots and a pigeon perched on the rim of a metal basin filled with water, resting on a high marble base. A pomegranate lies beside the base, while a cat is shown preparing to spring towards the birds.
The scene belongs to a long artistic tradition ultimately associated with the celebrated mosaics of Sosos of Pergamon, mentioned by Pliny the Elder (Natural History, XXXVI, 184). Sosos was famous for a composition showing doves drinking from a vessel, a motif that was repeatedly adapted by mosaicists throughout the Hellenistic and Roman world.
The Capuan mosaic is not a direct reproduction of that lost work, but a creative variation on the same theme. Here the traditional drinking birds are transformed through the introduction of colourful parrots, the pomegranate and the crouching cat, giving the composition a distinctly animated character.
Comparable representations of birds gathered around drinking vessels are known from several sites of the Greek and Roman world, including Pompeii, demonstrating the wide circulation and long-lasting popularity of this pictorial theme.
Although this particular mosaic was not found at Pompeii, it provides a useful comparison for the refined mosaic art produced and appreciated in Roman Campania during the late Republican period.