http://www.messagetoeagle.com/10-remarkable-ancient-indian-sages-who-were-familiar-with-advanced-technology-science-long-before-modern-era
Perhaps more esoteric than occult, fascinating none the less.
http://www.messagetoeagle.com/ancient-secrets-of-the-nine-unknown-men-guardians-of-forbidden-knowledge-hidden-from-humanity
History is full of cases of hidden & suppressed knowledge.
http://www.messagetoeagle.com/10-remarkable-similarities-between-ancient-civilizations-that-offer-proof-of-universal-prehistoric-knowledge