Effective period / Period of releases: 1976

Members: Χρήστος Βλαχάκης, Νικόλαος Γράψας, Μάριος Γιαμαλάκης, Αθανάσιος Αλατάς

Ta 4 Epipeda Tis Yparxis (translation: "The 4 Levels Of Existence") was a Greek psychedelic/hard rock group, active in the '70s. They originally released only one self-titled album in 1976 on an OMONOIA SOUND label called "Venus". It was reissued in 1995 (Wipe Out! Records), in 2002 (Ίκαρος), and in 2009 (Anazitisi Records).

In 2009, Jay-Z used a sample from the band's "Κάποια μέρα στην Αθήνα" ("Someday in Athens") on his song "Run This Town" (featuring Rihanna & Kanye West). The song won 2 Grammy awards in 2010 (best song & best rap song) and Athanasios Alatas, who was the original composer, awarded as a co-writer.

Former member: Νίκος Δούναβης (Nikos Dounavis) - Guitar (1974-75).