Homer's Iliad and Odyssey were created, probably in the second half of the 9th century BC, in the framework of the Greek epic tradition of oral formulaic poetry, which started in the Peloponnese in proto-Mycenaean times (c. 1600 BC). The epic verse, the dactylic hexameter, must have been taken over from the Minoan Cretans. Whereas most 19th century scholars were analysts, considering Homer's epics' conflations of older and more recent epic poems, most modern scholars are unitarians, recognizing the unity of both epics, thanks to modern insights in the nature of oral traditional poetry and to modern narratology. Although many modern scholars ascribe the Odyssey to a later poet than that of the Iliad, there are no convincing arguments against the Ancients' opinion that both epics are the work of one single poet called Homer. Both Iliad and Odyssey are characterized by the principle of ‘unity of action’, a principle not found in other ancient epic poetry. There are reasons to suppose that Homer learnt the art of epic versification in Smyrna, his native city, by listening to performances of Aeolic singers. Driven by Ionic self-consciousness he transposed the epic Aeolic Kunstsprache into Ionic, thus creating the so-called Homeric dialect. He could perform his monumental epics at great religious festivals and at the courts of princes. There is evidence that he gave performances in the island of Euboea, the only prosperous region of the contemporary Greek world, and that there his epics were eventually written down. Thus, Homer's epics are the end-point of the oral epic tradition and the starting point of written Greek and European literature.