Venosa is rich in evidence of its ancient history, in addition to the important prehistoric site of Notarchirico, there is an important Roman archaeological area in the town of S. Rocco.

The most interesting elements of the archaeological park are undoubtedly the baths and the amphitheatre.  There are also many testimonies of private domus.

The spa complex consists of several rooms, in particular it is observed that in the tepidarium there are small brick pillars, and the frigidarium has mosaic floors with geometric subjects of marine animals.

The amphitheater of the Julius Claudian age could accommodate about 10,000 spectators and was elliptical in shape, it retains part of the perimeter and parts masonry in the styles opus mixtus and opus reticulatus.

In Venosa it is possible to see the nuanced transition from ancient Rome to the Middle Ages, which takes concrete form in the Abbey of the Holy Trinity, with its stratification retains integrated elements of later eras.

From the outside there is a double structure that includes two churches that date back to Norman times. The first, called the ancient church, is in Romanesque style, with a basilical plan with three naves, and preserves traces of the floor of the previous early Christian basilica of the sixth century AD, in turn built on a pagan temple of the god Imeneo. In addition to a lower floor were found mosaic floors of a private domus of imperial age.

Adjacent to this church there is another very impressive building, known as the unfinished church. Its construction began in the 13th century, but was suspended due to lack of funds. Today it remains exactly as it was left at the time. The perimeter of the apsidal Latin cross is complete with the walls raised and well preserved, inside two complete arches, five Corinthian columns and a supporting pillar, part of the facade and the baptistery are the elements that managed to build before abandoning the work.