Duke Ellington is one of the greatest musicians of the 20th century and the big-band era. He had, one could argue, three main musical projects: One was the production of dance-hall hits, two was the production of serious black music (music that would represent the 400-year history of African descendants in America), and three was the production of pieces that expressed his religious/existential feelings. Tonight is devoted to the third and in many ways most profound of Ellington's projects. Anyone who has heard his composition "Come Sunday" instantly understands that Ellington felt God as something that's inside and not outside of (or remote from) the human experience. (Town Hall, 1119 Eighth Ave, townhallseattle.org, 7:30 pm, $14-$36)