The mosaic on the Atrium wall at Dorset Museum used to be a floor mosaic, laid in a home on the outskirts of Roman Dorchester.
Mosaics were important features of high status Roman houses, both in towns and the countryside. They were made by setting small pieces of coloured stone, called tesserae, in mortar. The tesserae in this mosaic are made of local Portland stone and Purbeck marble, as well as fragments of ceramic tile.
The mosaic measures 7.15 metres by 4.8 metres.