[1] Older scholarship dated Niketas' death to about 890, but more recent research suggests that he was born around 885 and was active as late as 963.
[2] When Arethas, under pressure from Pope Nicholas I, moved to support the tetragamy[a] of the Emperor Leo VI, Niketas distributed all his master's goods to the poor and fled to Thrace.
He wrote about fifty hagiographies, a treatise on calculating the end times, a commentary on the Psalms and many other works, including possibly pamphlets against Leo VI and Euthymios.
[3] His biography of Gregory of Agrigento was highly esteemed by Symeon the Metaphrast, who included it in his synaxarium.
[4] He was accused of heresy for proclaiming himself God, although this probably means only that he emphasised the divine nature in man.