Central area of the museum: the Roman settlement of Iesso.
The layout of Iesso shows that it was built according to a regular plan. Of special interest is the section of the old northern wall where a defence tower and the remains of one of the town gates can be seen. The web of streets in the Archaeological Park is divided by three main axes: the cardo maximus and a secondary cardo, running from north to south, a possible decumanus, running from east to west, and an intervallum, which runs parallel to the wall. These streets delimited the insulae, the islands or urban blocks, which are approximately 1 actus (35.48 metres) wide by 1.3 actus (46.12 metres) long. Two of these blocks have been partially excavated. In one block a group of houses has been found, with one large domus being particularly remarkable; and in the other what must have been the public baths. A cellar has also been uncovered.
The museum holds a significant collection of the trove that has been unearthed in Guissona over the years by archaeologists: ceramic jars for the preparation, storage and transportation of food; amphoras, two-handled vessels in which wine and other liquids were kept; weights for weaving looms; spindles for spinning thread; objects made of bones, of different types for different uses; tools made of iron, for all kinds of work; lead pipes and other conduits; and bronze and silver pieces. They also made glass for drinking vessels, dishes and bottles.
