The Theme of Sebasteia (Greek: θέμα Σεβαστείας) was a military-civilian province (thema or theme) of the Byzantine Empire located in northeastern Cappadocia and Armenia Minor, in modern Turkey. It was established as a theme in 911 and endured until its fall to the Seljuk Turks in the aftermath of the Battle of Manzikert in 1071.
The theme was formed around the city of Sebasteia (modern Sivas). The region formed part of the Armeniac Theme from the mid-7th century. The theme is not mentioned in any source prior to the 10th century. In 908, Sebasteia appears for the first time as a distinct kleisoura (a fortified frontier district), and by 911 it had been raised to the status of a full theme.
The theme comprised the entirety of the Byzantine frontier regions along the middle course of the northern Euphrates. With the expansion of the Byzantine frontier, it was extended south and east as far as Melitene, Samosata and Tephrike, corresponding roughly to the ancient Roman provinces of Armenia Prima and parts of Armenia Secunda and Syria Euphratensis. After the mid-10th century, however, its extent was much reduced by the creation of new smaller themes.
Sivas (Armenian: Սեբաստիա; Latin: Sebastia, Sebastea, Sebasteia, Sebaste) is a city in central Turkey and the seat of Sivas Province. According to a 2011 estimate, its urban population is 425,297.
The city, which lies at an elevation of 4,193 feet (1,278 m) in the broad valley of the Kızılırmak river, is a moderately-sized trade center and industrial city, although the economy has traditionally been based on agriculture. Rail repair shops and a thriving manufacturing industry of rugs, bricks, cement, and cotton and woolen textiles form the mainstays of the city's economy. The surrounding region is a cereal-producing area with large deposits of iron ore which are worked at Divriği.
Sivas is also a communications hub for the north-south and east-west trade routes to Iraq and Iran, respectively. With the development of railways, the city gained new economic importance as junction of important rail lines linking the cities of Ankara, Kayseri, Samsun, and Erzurum. The city is linked by air to Istanbul.
Theme or themes may refer to:
The themes or themata (Greek: θέματα; singular θέμα, thema) were the main administrative divisions of the middle Byzantine Empire. They were established in the mid-7th century in the aftermath of the Slavic invasion of Balkans and Muslim conquests of parts of Byzantine territory, and replaced the earlier provincial system established by Diocletian and Constantine the Great. In their origin, the first themes were created from the areas of encampment of the field armies of the East Roman army, and their names corresponded to the military units that had existed in those areas. The theme system reached its apogee in the 9th and 10th centuries, as older themes were split up and the conquest of territory resulted in the creation of new ones. The original theme system underwent significant changes in the 11th and 12th centuries, but the term remained in use as a provincial and financial circumscription, until the very end of the Empire.
During the late 6th and early 7th centuries, the Eastern Roman Empire was under frequent attack from all sides. The Sassanid Empire was pressing from the east on Syria, Egypt, and Anatolia. Slavs and Avars raided Thrace, Macedonia, Illyricum and Greece and settled in the Balkans. The Lombards occupied northern Italy, largely unopposed. In order to face the mounting pressure, in the more distant provinces of the West, recently regained by Justinian I (r. 527–565), Emperor Maurice (r. 582–602) combined supreme civil and military authority in the person of an exarch, forming the exarchates of Ravenna and Africa. These developments overturned the strict division of civil and military offices, which had been one of the cornerstones of the reforms of Diocletian (r. 284–305). In essence however they merely recognized and formalized the greater prominence of the local general, or magister militum, over the respective civilian praetorian prefect as a result of the provinces' precarious security situation.
In Indo-European studies, a thematic vowel or theme vowel is the vowel *e or *o from ablaut placed before the ending of a Proto-Indo-European (PIE) word. Nouns, adjectives, and verbs in the Indo-European languages with this vowel are thematic, and those without it are athematic. Used more generally, a thematic vowel is any vowel found at the end of the stem of a word.
PIE verbs and nominals (nouns and adjectives) consist of three parts:
The thematic vowel, if present, occurs at the end of the suffix (which may include other vowels or consonants) and before the ending:
Athematic forms, by contrast, have a suffix ending in a consonant, or no suffix at all (or arguably a null suffix):
For several reasons, athematic forms are thought to be older, and the thematic vowel was likely an innovation of late PIE: Athematic paradigms (inflection patterns) are more "irregular", exhibiting ablaut and mobile accent, while the thematic paradigms can be seen as a simplification or regularisation of verbal and nominal grammar. In the Anatolian languages, which were the earliest to split from PIE, thematic verbs are rare or absent. Furthermore, during late PIE and in the older daughter languages, a number of athematic forms were replaced by thematic ones, as in prehistoric Greek *thes- 'god' versus *thes-o- > Classical Greek θεός (theós).