dignified -
having or expressing dignity; especially formality or stateliness in bearing or appearance; "her dignified demeanor"; "the director of the school was a dignified white-haired gentleman"
composed serenely self-possessed and free from agitation especially in times of stress; "the performer seemed completely composed as she stepped onto the stage"; "I felt calm and more composed than I had in a long time"
elegant refined and tasteful in appearance or behavior or style; "elegant handwriting"; "an elegant dark suit"; "she was elegant to her fingertips"; "small churches with elegant white spires"; "an elegant mathematical solution--simple and precise and lucid"
courtly,
stately,
formal refined or imposing in manner or appearance; befitting a royal court; "a courtly gentleman"
