The earliest extant literature written in what is now Scotland, was composed in Brythonic speech in the sixth century and has survived as part of Welsh literature. In the following centuries there was literature in Latin, under the influence of the Catholic Church, and in Old English, brought by Anglian settlers. As the state of Alba developed into the kingdom of Scotland from the eighth century, there was a flourishing literary elite who regularly produced texts in both Gaelic and Latin, sharing a common literary culture with Ireland and elsewhere. After the Davidian Revolution of the thirteenth century a flourishing French language culture predominated, while Norse literature was produced from areas of Scandinavian settlement. The first surviving major text in Early Scots literature is the fourteenth-century poet John Barbour's epic "Brus", which was followed by a series of vernacular versions of medieval romances. These were joined in the fifteenth century by Scots prose works.