Forum Hadriani was the northern-most Roman city on the European continent and the second oldest city of The Netherlands. It was located in the Roman province Germania Inferior and is mentioned on the Tabula Peutingeriana, a Roman road map.
The site Forum Hadriani formed the nucleus of the civitas of the Cananefates, who lived west of the Batavians. It was situated along the Fossa Corbulonis or Corbulo-canal. This waterway was established about 47 CE by the Roman general Gnaeus Domitius Corbulo, forming an important shortcut between the rivers Rhine and Meuse. After the Batavian Rebellion, in which they participated, the Cananefates became loyal allies of the Romans.
In 121 emperor Hadrian made a long voyage along the northwestern border of the empire, during which he visited the Cananefate town. He gave the town his own name, Forum Hadriani (Hadrian’s Market). An alternate name, maybe the only official name, was Municipium Aelium Cananefatium (Aelius being the family name of Hadrian). The shortened version of this name, MAC, has been found engraved in a couple of Roman milestones found in the neighbourhood.
About 270 CE, after several plagues and attacks by Saxon pirates, the Romans abandoned Forum Hadriani.
In 1771 a bronze right hand was excavated during garden work on the estate Arentsburg. This hand was used by Étienne Maurice Falconet as model for the equestrian statue of Peter the Great, The Bronze Horseman. The first scientific excavations at the site of Forum Hadriani were carried out by Caspar Reuvens, between 1827-1833. Reuvens held the first professorship Archaeology ever, worldwide. Reuvens died before he could publish his findings. More excavations were done between 1908 and 1915 by Jan Hendrik Holwerda, he published the results of Reuvens together with his own discoveries in a comprehensive monograph in 1923.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.