The following seven Roman mosaics are all currently on display in the Palazzo Massimo alle Terme National Museum, Rome. Mosaics were a common feature of Roman private homes and public buildings across the empire from Africa to Antioch. Mosaics, otherwise known as opus tesellatum, were made with small black, white, and coloured squares typically measuring between 0.5 and 1.5 cm, but fine details were often rendered using even smaller pieces as little as 1 mm in size. These squares (tesserae or tessellae) were cut from materials such as marble, tile, glass, smalto (glass paste),pottery, stone, and even shells. A base was first prepared with fresh mortar, and the tesserae positioned as close together as possible with any gaps then filled with liquid mortar in a process known as grouting. The whole was then cleaned and polished. Mosaics were by no means limited to flooring. Vaults, columns, and fountains were often decorated with mosaic, especially in Roman baths. Popular subjects were figures and scenes from Roman mythology, landscapes, and still-lifes.
To read more about this fascinating art form, see Ancient History Encyclopedia’s article on Roman Mosaics.