Brandes' art is abstract and often in brown colours. He had his breakthrough as artist in the beginning of the 1980s. He has inter alia done artwork on Roskilde Domkirke and mosaic (colored glass) windows in a church at Nordkap and the church Village of Hope, south of Los Angeles.
Brandes is self-taught and his art circles around themes from Christianity. Also the ancient Greek mythology has inspired his art. Brandes has illustrated a number of books, for example Homer’s Iliad. A great part of Brandes' ceramic works are inspired by ancient Greek art and mythology
^Kirkekunst: LYSMETAFYSIK. Når mennesket ikke kan fremstille Gud, må tilfældet tale. Tilfældet er i denne æstetik det, der rydder en lysning i ordenes og billedernes skov, sådan at det hellige kan indfinde sig. Weekendavisen, 19.03.2008, 3 Sektion, KULTUR, Side 3
^Vejle: Peter Brandes skal udsmykke altervæggen i Nørremarkskirken Vejle Amts Folkeblad, 18.09.2009, Vejle, Side 5
^Peter Brandes udstiller på Skovgaard Museet Viborg Nyt, 18.06.2008, Side 4