The present-day Káptalandomb (Chapter Hill), the ancient core of the town, lies at the junction of the Rába and the Moson-Danube rivers. According to archaeological findings, it was inhabited, among others, by Illyrians, Scythians, and Celts. The probably Celtic name of the river Raba is found in Arrabona, the Roman name of the city. Here the important roads coming from Savaria (Szombathely) and Sopianae (Pécs) merge with the limes road, so it is not a coincidence that this region was already occupied by an auxiliary force during the reign of Claudius in the middle of the first century. Later, after the construction of the permanent stone fortress, the town maintained its importance, and so, at the beginning of the 2nd century, it received ala Ulpia contariorum milliaria, the only double-sized cavalry of Pannonia superior as garrison. It is believed that this unit remained the garrison of Arrabona until the late Roman times.

You can find Roman relics in the Castle Casemate’s Stone Collection.

Source and additional information:

http://romer.hu/varkazamata-kotar/

http://www.ripapannonica.hu/magyar/kulturalis.php?id=29

https://limes.blog.hu/2011/04/03/gyor_okori_oroksege

https://hu.wikipedia.org/wiki/V%C3%A1rkazamata-K%C5%91t%C3%A1r_(Gy%C5%91r)

IThe Roman commander Tiberius conquered Pannonia in 9 AD and Transdanubia as a part of the province of Pannonia became a part of the Empire as a border province. In the 2nd century, a Roman military fortification was built in Barátföldpuszta, which belongs to Lébény, as a part of the border protection system. The milestone which once stood on the road by the fortification was recovered from here during the course of archeological excavations. The stone column, an artifact upholding the memory of times long past, today ornaments the yard of a primary school.

Forrás és további információ:

https://rabcatorok.pannonhelyitermek.hu/ertekleltar/epitett-oroksegunk/romai-merfoldko

While walking in Mosonmagyaróvár one would search for the remains of the Ad Flexum Roman camp in vain, because, apart from the stone collection of the Hanság Museum, only a few exhibits have remained from the once populous Roman settlement named after the Moson-Danube bend. Nothing was left from the camp on the surface, and what is stranger: not even under the surface. Ad Flexum simply disappeared from the face of the earth. The barbarians and the weather usually devastated only to ground level, so the question may arise what had happened in Magyaróvár. Find it out in the Hanság Museum!

Source and additional information:

https://dunaiszigetek.blogspot.com/2013/06/mysterium-ad-flexum.html

http://www.ripapannonica.hu/magyar/kulturalis.php?id=7

http://www.hansagimuzeum.hu/content/?mid=45

A collection of artifacts from Roman times in the town of Oroszvár located on the limes.

The limes road divided into two branches east of Carnuntum. The real limes road continued to follow the Danube whilst the other circumvented the Hainburg mountain from the south and headed straight for Ad flexum. Along the other road, we will soon arrive at the fort of Gerulata (Oroszvár-Rusovce) located in modern day Slovakia. Ágost Sőtér identified Gerulata over 100 years ago. The fort stands in the northwestern part of modern-day Rusovce not far from the old Danube riverbed.

Forrás és további információ:

http://www.neszmeritunde.sk/tartalom/gerulata-a-romai-erod

http://www.ripapannonica.hu/magyar/kulturalis.php?id=6

http://www.muzeum.bratislava.sk/en/vismo/dokumenty2.asp?id_org=700016&id=1026