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
The Picts were a group of peoples in what is now Scotland north of the Firth of Forth, in the Early Middle Ages. Where they lived and details of their culture can be gleaned from early medieval texts
Causantín mac Cináeda
…is often known as Constantine I in reference to his place in modern lists of Scottish monarchs, but contemporary sources described Causantín only as a Pictish king. A son of Cináed mac Ailpín ("Kenneth MacAlpin"), he succeeded his uncle Domnall mac Ailpín as Pictish king following the latter's death on 13…
The Aberlemno I roadside symbol stone, Class I Pictish stone with Pictish symbols, showing (top to bottom) the serpent, the double disc and Z-rod and the mirror and comb
Silver plaque from the Norrie's Law hoard, Fife, with double disc and Z-rod symbol
The so-called Daniel Stone, cross slab fragment found at Rosemarkie, Easter Ross
The Whitecleuch Chain, high-status Pictish silver chain, one of ten known to exist, dating from between 400 and 800 AD