Antique steel engraved print published 1845, of the Royal Italian Opera House. This image is from ‘Curiosities of Great Britain. England and Wales Delineated. Historical, Entertaining & Commercial, Alphabetically Arranged by Thomas Dugdale, Antiquarian. Assisted by William Burnett.’ (Dugdale was a professional artist, whilst Burnett was a civil engineer by profession.) Together they produced a series of steel engraved prints of English and Welsh architectural and topographical features, together with County Maps. Thanks to Wikipedia for the linked information.