century AD). Libyco-Berber and Punic inscriptions appear on public buildings into the 2nd century, some bilingual with Latin. In Syria, Palmyrene soldiers even used their dialect of Aramaic for inscriptions, in a striking exception to the rule that Latin was the language of the military. The Babatha Archive is a suggestive example of multilingualism in the Empire. These papyri, named for a Jewish woman in the province of Arabia and dating from 93 to 132 AD, mostly employ Aramaic, the local language, written in Greek characters with Semitic and Latin influences; a petition to the Roman governor, however, was written in Greek. The dominance of Latin among the literate elite may obscure the continuity of spoken languages, since all cultures within the Roman Empire were predominantly oral. In the West, Latin, referred to in its spoken form as Vulgar Latin, gradually replaced Celtic and Italic languages that were related to it by a shared Indo-European origin. Commonalities in syntax and vocabulary facilitated the adoption of Latin. After the decentralization of political power in late antiquity, Latin developed locally into branches that became the Romance languages, such as Spanish, Portuguese, French, Italian, Catalan and Romanian, and a large number of minor languages and dialects. Today, more than 900 million people are native speakers worldwide. As an international language of learning and literature, Latin itself continued as an active medium of expression for diplomacy and for intellectual developments identified with Renaissance humanism up to the 17th century, and for law and the Roman Catholic Church to the present. Although Greek continued as the language of the Byzantine Empire, linguistic distribution in the East was more complex. A Greek-speaking majority lived in the Greek peninsula and islands, western Anatolia, major cities, and some coastal areas. Like Greek and Latin, the Thracian language was of Indo-European origin, as were several now-extinct languages in Anatolia attested by Imperial-era inscriptions. Albanian is often seen as the descendant of Illyrian, although this hypothesis has been challenged by some linguists, who maintain that it derives from Dacian or Thracian. (Illyrian, Dacian, and Thracian, however, may have formed a subgroup or a Sprachbund; see Thraco-Illyrian.) Various Afroasiatic languages—primarily Coptic in Egypt, and Aramaic in Syria and Mesopotamia—were never replaced by Greek. The international use of Greek, however, was one factor enabling the spread of Christianity, as indicated for example by the use of Greek for the Epistles of Paul.