The mosaic is composed of small, colourful tiles arranged into geometric shapes and patterns.
One such pattern, for instance, shows an intricate mix of black, white and red tiles interweaving together.
The archaeologists said this is one of the largest-known mosaics in the south of the Iberian peninsula.
Mosaics were a staple in Roman households and public buildings alike, often depicting scenes of nature or everyday life.
The tiled artwork can be found today at archaeological sites across the Mediterranean and Africa, as well as here in Britain.