Palatial – of, like, or suitable for a palace; hence, large and ornate; stately; magnificent

“Throughout [Longfellow’s] life, he attached an extremely high value to politeness, common courtesy, dignity, and good citizenship, as well as to domestic comforts of a level of elegance that Ralph Waldo Emerson, on his visits to Cambridge from small-town Concord, found disorientingly palatial.”

Lawrence Buell, in the introduction to Henry Wadsworth Longfellow: Selected Poems