[2][6] Nikli and the rest of Arcadia were captured by the Crusaders in circa 1206–09, becoming part of the new Frankish Principality of Achaea, which soon came to encompass most of the Peloponnese.
[7] The Chronicle of the Morea depicts Nikli as a site of some importance and fortified, which fell to the Crusaders only after a siege.
[11] It is a suppressed titular see of the Catholic Church, counting 18 incumbents between 1541 and the death of the last holder in 1937.
[12] It has had the following incumbents, all of the lowest (episcopal) rank : Nikli was still in Frankish hands in 1280, but was lost to the resurgent Byzantines by 1302.
[14] The Orthodox see continued in existence thereafter: in 1562 it is recorded as the first-ranked (protothronos) among the suffragans of Lacedaemon.