Theory of Art is a 1987 reissue of A Night in Tunisia, a 1957 jazz album released by Art Blakey & the Jazz Messengers for RCA's Vik label. It was released, with a newly designed booklet and CD tray inlay in 1997.
The album features alto saxophonist Jackie McLean, who had recently left the Jazz Messengers, on a rare date with his successor, tenor saxophonist Johnny Griffin.
The CD re-issue features two additional tracks from a separate date led by Blakey. This group is a nonet which includes Lee Morgan, shortly to formally join the Jazz Messengers, among others.