From The SpiritWiki
Prisca Theologia (Ancient Theology) is a doctrine that asserts that an ancient, single, true, theology exists (Truth with a capital "T") but that this theology has been subverted and submerged for various reasons, and consequently must now be recovered 
Authentic Spirituality > Cosmic Religion, Identity Consistent Spirituality, Mysticism, Perennial Philosophy, Positive Religion, Progressive Spirituality, Pure Religion, Right Path, The Path, The Way, True Path
European Grand Narrative > Common Core, Perennial Philosophy, Philosophia Perennis, Pia Philosophia, Platonic Orientalism, Prisca Theologia
Marsilio Ficini (1433-1499) the "virtual founder of the Renaissance Prisca Theologia narrative.