The Roman fort, first mentioned as Partiscum by Claudius Ptolemy in the 2nd century A.D., lies in southern Hungary and in the southern part of the Great Hungarian Plain on the lower reaches of the Tisza River, which flows into the Danube about 120 kilometres south into Serbia/Vojvodina. At the eastern city border the Maros (Latin Marisus, Romanian Mureș) flows into the Tisza. The Maros forms here also the natural border to Romania. The Roman ruins are today covered by the city centre.
