Dacia was the land inhabited by the Dacians, its core in Transylvania, stretching to the Danube in the south, the Black Sea in the east, and the Tisza in the west. The Carpathian Mountains were located in the middle of Dacia. It thus roughly corresponds to present-day Romania, as well as parts of Moldova, Bulgaria, Serbia, Hungary, Slovakia, and Ukraine.
Moesia was an ancient region and later Roman province situated in the Balkans south of the Danube River. As a Roman domain Moesia was administered at first by the governor of Noricum as 'Civitates of Moesia and Triballia'. It included most of the territory of modern eastern Serbia, Kosovo, north-eastern Albania, northern parts of North Macedonia, Northern Bulgaria, Romanian Dobruja and small parts of Southern Ukraine.
Tulcea is a city in Northern Dobruja, Romania. It is the administrative center of Tulcea County, and had a population of 65,624 as of 2021. One village, Tudor Vladimirescu, is administered by the city. It is one of six Romanian county seats lying on the Danube river.
Trajan's Bridge, also called Bridge of Apollodorus over the Danube, was a Roman segmental arch bridge, the first bridge to be built over the lower Danube and considered one of the greatest achievements in Roman architecture. Though it was only functional for 165 years, it is often considered to have been the longest arch bridge in both total span and length for more than 1,000 years.
Kladovo is a town and municipality located in the Bor District of eastern Serbia. It is situated on the right bank of the Danube river.
Troesmis was an ancient Dacian town and later ancient Roman city and legionary fortress, a major site situated on the Danube and forming a key part of the Limes Moesiae frontier system. Around the fortress the Geto-Dacian town developed.
Porolissum was an ancient Roman city in Dacia. Established as a military fort in 106 during Trajan's Dacian Wars, the city quickly grew through trade with the native Dacians and became the capital of the province Dacia Porolissensis in 124. It is one of the largest and best-preserved archaeological sites in modern-day Romania from the Roman Era. It is 8 km away from the modern city of Zalău, in Moigrad-Porolissum village, Mirsid Commune, Sălaj County.
Dinogetia was an ancient Geto-Dacian settlement and later Roman fort located not far from the right (southern) bank of the Danube near the junction of the Siret River. The Dinogetia site is situated in Northern Dobruja, Romania, 8 km east of Galați and 2 km north of Garvăn, a village in Jijila commune.
Trajan's First Dacian War took place from 101 to 102.
The Moesian Limes is the modern term given to a linked series of Roman forts on the northern frontier of the Roman province of Moesia along the Danube between the Black Sea shore and Pannonia and dating from the 1st century AD. It was the eastern section of the so-called Danubian Limes and protected the Roman provinces of Upper and Lower Moesia south of the river. The eastern section is often called the limes Scythiae minoris as it was located in the late Roman province of Scythia Minor.
Civitas Tropaensium or Tropaeum Traiani was a Roman city situated in the Roman province of Moesia near modern Adamclisi in Constanța County, Romania. It was named after Trajan's Trophy built nearby.
Capidava was originally an important Geto-Dacian centre on the right bank of the Danube. After the Roman conquest, it became a civil and military centre in the province of Moesia Inferior and part of the defensive frontier system of the Moesian Limes along the Danube.
Taliata was a Roman town and fort located near the present town of Donji Milanovac in eastern Serbia. It is included in the Tabula Peutingeriana.
Tibiscum was a Dacian town mentioned by Ptolemy, later a Roman fort and municipium. The ruins of the ancient settlement are located in Jupa, near Caransebeș, Caraș-Severin County, Romania. The Roman settlement here was one of the most important vestiges of classical antiquity in Banat.
Sacidava was a fort in the Roman province of Moesia near the Getic settlement and later Roman city of Sacidava, Moesia that developed around the fort. It is located at Musait between the villages of Rasova and Dunareni, on a high hill on the right bank of the Danube. It is included in the Tabula Peutingeriana as Sagadava and the Notitia Dignitatum as Sacidava.
Noviodunum ad Istrum was a Roman city that developed around the legionary fortress and naval port near the present town of Isaccea. It was in the Roman province of Moesia and was the headquarters of the Roman Danube fleet located on the lower Danube and, from the 4th century AD, the headquarters of the Legio I Iovia (Scythica).
Roman Dacia was a province of the Roman Empire from 106 to 271–275 AD. Its territory consisted of what are now the regions of Oltenia, Transylvania and Banat. During Roman rule, it was organized as an imperial province on the borders of the empire. It is estimated that the population of Roman Dacia ranged from 650,000 to 1,200,000. It was conquered by Trajan (98–117) after two campaigns that devastated the Dacian Kingdom of Decebalus. However, the Romans did not occupy its entirety; Crișana, Maramureș, and most of Moldavia remained under the Free Dacians.
The Danubian Limes, or Danube Limes, refers to the Roman military frontier or limes which lies along the River Danube in the present-day German state of Bavaria, in Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria and Romania.
The Dacian Limes is the generic modern term given to a collection of ramparts and linked series of Roman forts on the frontiers of the Roman province of Dacia dating from the early 2nd century AD. They ran for about 1,000 km and included the:
Pontes fort was an ancient Roman fort situated on the river Danube in the Roman province of Moesia and forming a key part of the Limes Moesiae frontier system. It is near the modern town of Kladovo, Serbia. It was built in about 103-105 AD and is one of the most important Roman sites along the Danube as it protected the southern end of the strategic Trajan's Bridge over the river.
Serbia 
