Ceredigion sources of income. Ceredigion's population at the 2011 UK census was 75,900. Its largest town, Aberystwyth, is one of its two administrative centres, the other being Aberaeron. Aberystwyth houses Aberystwyth University, Bronglais Hospital and the National Library of Wales. Lampeter is home to part of the University of Wales Trinity Saint David. Ceredigion has been inhabited since prehistoric times. A total of 170 hill forts and enclosures have been identified across the county and there are many standing stones dating back to the Bronze Age. Around the time of the Roman invasion of Britain, the area was between the realms
History of the Welsh language (Breton, Cornish, and the extinct Cumbric). It is not clear when Welsh became distinct. Kenneth H. Jackson suggested that the evolution in syllabic structure and sound pattern was complete by around 550, and labeled the period between then and about 800 "Primitive Welsh". This Primitive Welsh may have been spoken in both Wales and the Hen Ogledd ("Old North"), the Brythonic-speaking areas of what is now northern England and southern Scotland, and therefore been the ancestor of Cumbric as well as Welsh. Jackson, however, believed that the two varieties were already distinct by that time. The earliest Welsh poetry –