In a prevailingly lowland region between two rivers the Mlava and the Busura, on a gently elevated area called “Gradac” by the locals, there are partially preserved remains of a Roman fort. It is located by the right river bank of The Busura, 2,5km to the northwest of Veliko Laole and 4km to the southwest of Petrovac na Mlavi.
The fort is of almost regular square form, and dimensions of about 120 х 90m. Its position was long established by Felix Kanitz in the mid XIX century since he then noticed well – kept ramparts and the remains of four round towers on the corners of the fort. Due to the surrounding overgrowth, today the rampart remains are merely visible and only according to terrain configuration, traces of construction rubble and plaster. The traces of objects inside the fort and its vicinity are also partially discernible.
After the Municipium stop which can be easily identified by archaeological findings in Kalište village there is a marked stop (mutatio) Iovis Pagus in Tabula Peutengeriana and Itinerarium Hierosolymitanum (Jerusalem Itinerary) that label the Roman road connecting Singidunum (Belgrade) and Constantinople. According to both map sources, it was 10 Roman miles (14,8 кm) away from Municipium, the data that does not match with the condition in the area. Thus there is a certain constraint regarding the identification the Gradac fort and Roman Iovis Pagus. This difference can be the result of a cartographers’ mistake but also the insufficiently explored locality Gradac and others in wider area of Petrovac.
According to poor data we hold, it is assumed that the first phase of the fort is from II century, the first fortification appeared in the mid of IV century which is the period of the highest rise, and after VI century the life on this locality slowly fades out.