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
Kingdom of Ceredigion situated in the Vale of Cothi, in Cantref Mawr, and far south of the county boundary of the Teifi, were sometimes spoken of as being in Cardiganshire (Ceredigion). The "Chronicon" of Adam of Usk states that the cwmwd of Caio (properly Cynwyl Caio) was situated ""in Comitatu di Cardikan"." In the Charter of Talley Abbey, Brechfa is also spoken of as ""Lanteilau Brechfa apud Keredigaun"." These statements may be simply mistakes, or they may be echoes of the fact that the kings of Ceredigion conquered Y Cantref Mawr in, the eighth century. The same authority on Welsh topography also deals