Italian occult psychedelia (IOP) is a subgenre of Italian psychedelic music[1] characterized by obscure atmospheres. Italian occult psychedelia was coined by journalist Antonio Ciarletta in an article published by Italian music magazine Blow Up,[2] in January 2012.[3][4]
A festival called Thalassa[5][6] has occurred in Rome since 2013 to celebrate Italian occult psychedelia bands.[7][8]