Grand opera house, Baroque architecture, ornate decorations, golden details, red velvet curtains, crystal chandeliers, luxurious interior, grand staircase, marble floors, intricate frescoes, high ceilings, dramatic lighting, spotlights on stage, elegant audience, formal attire, evening atmosphere, cityscape, Vienna, Paris, 18th century, Renaissance-inspired, opulent, majestic, ornamental carvings, gilded moldings, frescoed ceiling.