Watercolors of the insides of fancy places. Maybe if you gaze at them long enough you can go in. French. Jules Diéterle, artist (1811-1889). Also worked as an architect, theatre decorator and painter on porcelain.

“Chambre d’apparat, 1851. ca. 1851. Watercolor. Image ©2020 Artnet Worldwide Corporation. Fair use license. via http://www.artnet.com/artists/jules-pierre-michel-dieterle/chambre-dapparat-1851-278QCdmTWAkv8I6x5pStoA2
Projet de décor. 19th c. Pen and black ink, gray watercolor wash heightened with white gouache on black pencil lines. Attributed to Jules Pierre Michel Diéterle. Image © Millon & Associés. Fair use license. via https://www.millon.com/lot/84477/8014484?npp=20&