Causantín mac Cináeda was King of the Picts from 862 until his death in 877. He is often known as Constantine I in reference to his place in modern lists of Scottish monarchs, but contemporary sources
A signboard in Fife, Scotland concerning Causantín
"Constantine's Cave" – also known as the Nigra Specus ("Black Cave") – at Balcomie near Crail in Fife, Scotland: the supposed death place of Causantín
Iona is an island in the Inner Hebrides, off the Ross of Mull on the western coast of Scotland. It is mainly known for Iona Abbey, though there are other buildings on the island. Iona Abbey was a cent
Causantín mac Cináeda
…Berchán. The account in the Chronicle of Melrose names the place as the "Black Cave" and John of Fordun calls it the "Black Den". Causantín was buried on Iona. Causantín's son Domnall and his descendants represented the main line of the kings of Alba and later Scotland…
Beach on the west side of Iona at Camas Cuil an t Saimh geograph.org.uk 4785238
Iona Marble Quarry geograph.org.uk 380937