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Book I
Note B

This webpage reproduces a chapter of
Italy and her Invaders

by
Thomas Hodgkin

published by the Clarendon Press
Oxford
1880

The text, and illustrations except as noted,
are in the public domain.

This page has not yet been proofread.
If you find a mistake though,
please let me know!


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Book I
Ch. 5

Vol. I
p275
On the Division of Illyricum

The division of the Empire between East and West on the accession of the sons of Theodosius, though it was possibly meant to be less complete than some preceding partitions,1 proved to be the final one. It is worth while to indicate the line of division, which is sufficiently accurately traced for us in the Notitia. In Africa it was the well-known frontier marked by 'the Altars of the Philaeni.' which separated Libya (or Cyrenaica) on the East from Africa Tripolitania on the West. Modern geographers draw exactly the same line (about 19° E. of Greenwich) as the boundary of Barca n Tripoli.

On the Northern shore of the Mediterranean the matter is a little more complicated. Noricum, Pannonia, Savia, and Dalmatia belonged to the West, and Dacia — not the original but the later province of Dacia — to the East. This gives us for the frontier of the Western Empire the Danube as far as Belgrade, n on the Adriatic the modern town of Lissa. The inland frontier is traced by geographers some 60 miles up the Save from Belgrade, t9 southwards by the Drina to its source, and so across the mountains to Lissa. Thus Sclavonia, Croatia, and Dalmatia in the Austrian Empire, and Croatia, most of Bosnia, Herzegovina, and Montenegro in the state which was lately called Turkey in Europe, belonged to the Western Empire. The later province of Dacia, which fell to the Eastern share, included p276Servia (Old and New), the south-east corner of Bosnia, the North of Albania, and the west of Bulgaria. By this partition the Prefecture of Illyricum, as constituted by Diocletian, was divided into two nearly equal parts. The north-western half, which we may call speaking roughly the Austrian (including Austria's recent acquisitions in the direction of Bosnia), was given to Rome, while the south-eastern, or the Turkish and Greek half fell to the dominion of Constantinople.

What makes the subject somewhat perplexing to the student is the tendency to confuse Illyricum the province and Illyricum the prefecture. The former was nearly identical with the province afterwards called Dalmatia (Modern Dalmatia + Bosnia + Herzegovina), n was allotted almost in its entirety to the Western Empire. The latter reached, as we have seen, from the Danube to Cape Matapan. It is of this that historians are thinking when, in describing the territorial changes of this period, they speak of Eastern and Western Illyricum.

Some modern writers have represented that this division of Illyricum was a grievance which Old Rome had against New at the close of the fourth century. Tillemont (Histoire des Empereurs, V.157) has shown that the division was made by Gratian at the time of the accession of Theodosius. It is nowhere, I believe, mentioned by contemporary historians as a cause of quarrel, and in fact, looking back to the Diocletianic scheme of division, it would rather seem as if the East were e5dd to complain at not having the whole of the Prefecture of Illyricum than the West at having to relinquish a part.


The Author's Note:

1 'Archadius et Honorius Germani utrumque imperium divisis tantum sedibus tenere coeperunt.' Marcellini Chronicon, s. a. 395. Marcellinus, however, is by no means a contemporary authority, having written in the middle of the sixth century.

Page updated: 4 Mar 12