Forgetting Oblivion

Oblivion, as a forgotten memory, is in relation to an observer; a record of an event that took place (or not - false memory) that was remembered for some time and then faded away and forever became erased from memory. Oblivion could be individual but it seems it makes most sense as a collective event, similarly as collective remembering. But in most cases there is no oblivion without some kind of previous memory articulated through a certain entity (museum, history, documents, artifacts). In  oblivion they both disappear into the (timeless) eternity.