A composite aircraft cabin monument construction, comprising: a lower modular rectangular cuboid comprising a lower left side panel, the lower left side panel constructed of a composite panel structure, the composite panel structure constructed of at least two parallel carbon fiber spread tow fabric, STF, face sheets surrounding a hexagonal cell inner core sheet, each STF face sheet comprising a fabric of interwoven carbon fiber tape, the hexagonal cell inner core sheet having a main ribbon direction, the at least two parallel carbon fiber STF face sheets including a first pair of STF face sheets having a first weave parallel and at right angles to the main ribbon direction, and a second pair of STF face sheets having a second weave approximately 45 degrees to the main ribbon direction, each of the first and second weaves comprising one carbon fiber tape and a second carbon fiber tape oriented at approximately 90 degrees relative to each other; the lower modular rectangular cuboid further comprising a lower right side panel, a lower back panel, and a lower top panel, each of the lower right side, back and top panels constructed of the composite panel structure; the lower modular rectangular cuboid further comprising a lower frame encircling one of the lower back panel and the lower top panel, the lower frame configured for joining each of the lower left and lower right side panels to one of the lower back and the lower top panels; an upper modular rectangular cuboid comprising an upper left side panel, an upper right side panel, an upper base panel, an upper back panel, and an upper top panel, each panel of the upper modular rectangular cuboid constructed of the composite panel structure; the upper modular rectangular cuboid including an upper frame encircling one of the upper base panel and the upper back panel, the upper frame configured for joining each of the upper left and upper right side panels to one of the upper back and the upper base panels; the upper modular rectangular cuboid configured to couple with the lower modular rectangular cuboid, the base of the upper modular rectangular cuboid coupling with the top of the lower modular rectangular cuboid. a lower modular rectangular cuboid comprising a lower left side panel, the lower left side panel constructed of a composite panel structure, the composite panel structure constructed of at least two parallel carbon fiber spread tow fabric, STF, face sheets surrounding a hexagonal cell inner core sheet, each STF face sheet comprising a fabric of interwoven carbon fiber tape, the hexagonal cell inner core sheet having a main ribbon direction, the at least two parallel carbon fiber STF face sheets including a first pair of STF face sheets having a first weave parallel and at right angles to the main ribbon direction, and a second pair of STF face sheets having a second weave approximately 45 degrees to the main ribbon direction, each of the first and second weaves comprising one carbon fiber tape and a second carbon fiber tape oriented at approximately 90 degrees relative to each other; the lower modular rectangular cuboid further comprising a lower right side panel, a lower back panel, and a lower top panel, each of the lower right side, back and top panels constructed of the composite panel structure; the lower modular rectangular cuboid further comprising a lower frame encircling one of the lower back panel and the lower top panel, the lower frame configured for joining each of the lower left and lower right side panels to one of the lower back and the lower top panels; an upper modular rectangular cuboid comprising an upper left side panel, an upper right side panel, an upper base panel, an upper back panel, and an upper top panel, each panel of the upper modular rectangular cuboid constructed of the composite panel structure; the upper modular rectangular cuboid including an upper frame encircling one of the upper base panel and the upper back panel, the upper frame configured for joining each of the upper left and upper right side panels to one of the upper back and the upper base panels; the upper modular rectangular cuboid configured to couple with the lower modular rectangular cuboid, the base of the upper modular rectangular cuboid coupling with the top of the lower modular rectangular cuboid.