How and why and when and where did the idea of “Twelve Teachers of rDzogs-chen” (rdzogs chen ston pa bcu gnyis) arise? Trying to answer questions as to whether these are historical figures or not would be futile. A historical development of the idea of rdzogs chen ston pa bcu gnyis would be perhaps feasible and beneficial. A list of these can be found, for example, Palmo 2008 [= Brilliant Moon]: 303, n. 3; Chags-med, Phyag rdzogs zung ’jug (p. vol. 1, p. 270).