Elvis Presley's last two films were concert documentaries -- 1970's "Elvis: That’s The Way It Is" (re-edited in 2001) and 1972's "Elvis on Tour."

Both films show Presley at his full artistic maturity, highlighting the expansive, encompassing idea of American music that is inarguably his most valuable and lasting legacy. From there it was a slow-motion decline into the bloated "Elvis Has Left the Building" touring years.