Benjamin Henry Latrobe's basilica of 1821 — the first cathedral built in the United States — with a great dome lit by concealed skylights and a pale neoclassical interior.
Baltimore's 1888 Victorian conservatory in Druid Hill Park — a glass palm house with linked growing houses. Green, humid, and lit entirely through glass.
Opened 1878, the Peabody's stack room rises five tiers of cast-iron balconies to a skylight sixty feet above. One of the great interiors in America.