Quadra is the fifteenth studio album by Brazilian heavy metal band Sepultura, released on February 7, 2020.

Guitarist Andreas Kisser explained that the concept of the album is based on Quadrivium, which are the four subjects, or arts (namely arithmetic, geometry, music, and astronomy), taught after teaching the trivium.

Thom Jurek of AllMusic wrote in a review: "Quadra is Sepultura's first album to actually stand on equal qualitative footing with their classic trilogy.

It offers a series of tough, meaty, adventurous songs, that abundantly indulge raw power and emotion.

[6] Blabbermouth's Dom Lawson wrote that Quadra "plainly and loudly showcases the sound of a band at the height of their powers, both in terms of creativity and musicianship" and calls the album "one of their finest records yet".

Morgan Y. Evans wrote that the album ,"...is nothing short of a monument to a lifetime in metal, the determined triumph of a legacy name never saying die and following their trusted vision over popular opinion.

In a year filled with so much death even the band's name vibrates on some heavy karmic level, but "Isolation" especially resonates deeply in a time of so much social upheaval for justice reform.