Lesnoy Ave., 21-1, Saint Petersburg, Russia, 194044
The light-colored three-story stone building is a horizontally elongated free asymmetrical volumetric-spatial composition. The main facade of the building faces the courtyard, featuring a complex broken contour plan and whimsical curvilinear outlines. There are no repeating elements in the facade decoration. Various windows of different sizes and shapes, plaster of different textures combined with hewn and roughly chipped stone in the plinth treatment play a significant role in creating the image.
The side facade facing the avenue has a flat symmetrical composition with floor-by-floor rows of three rectangular windows. Only the glazed bay window, decorated with two herms, stands out.
The mansion on the avenue side is united with the People's House by an elegant metal fence on a granite plinth, built in 1904 according to the design of architect Meltzer.

In 1905, Marta Ludwigovna Nobel married the well-known Russian military doctor Georgy Oleynikov—of humble origin and much older than herself. This was an unconventional act for the "exclusively Swedish Nobel family." After marriage, Marta began studying medicine, graduated in 1909 from the St. Petersburg Women's Medical Institute, and worked as a surgeon at the Obukhov Hospital.
In a difficult family situation, Emmanuel Nobel supported his sister. In 1910, he expanded his mansion according to the design of architect Lidval to accommodate his sister's family—in the right wing at the back of the courtyard.
After the October Revolution, from 1918 until his death in 1932, the bachelor Emmanuel Nobel lived in Stockholm with his sister Marta and brother-in-law Georgy.
Sources:
https://www.citywalls.ru/house10158.html
Zakharyevskaya St., 23, Saint Petersburg, Russia, 191123
Nevsky Ave., 28, Saint Petersburg, Russia, 191186
Nevsky Ave., 56, Saint Petersburg, Russia, 191023
Nevsky Ave., 56, Saint Petersburg, Russia, 191023
Kronverksky Ave, 7, Saint Petersburg, Russia, 197046
Moika River Embankment, 73, Saint Petersburg, Russia, 190000
Fontanka River Embankment, 54, Saint Petersburg, Russia, 191002
Kamennoostrovsky Ave., 1-3, Saint Petersburg, Russia, 197046
Bolshaya Alley, 14, Saint Petersburg, Russia, 197376
Kirochnaya St., 24, Saint Petersburg, Russia, 191123
Kronverksky Ave, 1, Saint Petersburg, Russia, 197046
Sadovaya St., 21a, Saint Petersburg, Russia, 191023
Zagorodny Prospekt, 11, Saint Petersburg, Russia, 191002
7th Krasnoarmeyskaya St., 32, Saint Petersburg, Russia, 190005
Bolshaya Morskaya St., 3-5, 6th floor, office 3, Saint Petersburg, Russia, 191186
Moskovskoye Highway, 23, Saint Petersburg, Russia, 196601
Petrovskaya St., 9, Saint Petersburg, Russia, 197762
Bolshaya Alley, 13, Saint Petersburg, Russia, 197376
Polevaya Alley, 8, Saint Petersburg, Russia, 197376
Teatralnaya Alley, 3, Saint Petersburg, Russia, 197376
Primorskoe Highway, 570L, Saint Petersburg, Russia, 197720
Bolshaya Alley, 12, Saint Petersburg, Russia, 197376
Malaya Posadskaya St., 15, Saint Petersburg, Russia, 197046
Apraksin Lane, 6, Saint Petersburg, Russia, 191023
Malaya Posadskaya St., 19, Saint Petersburg, Russia, 197046
Malaya Konyushennaya St., 3, Saint Petersburg, Russia, 191186
Malaya Konyushennaya St., 1-3, Saint Petersburg, Russia, 191186
Bolshoy Prospekt of Vasilievsky Island, 92, Saint Petersburg, Russia, 197136
Sadovaya St., 34, Saint Petersburg, Russia, 194361
Bolshoy Sampsoniyevsky Ave., 27, Saint Petersburg, Russia, 194044
Lesnoy Ave, 19, Saint Petersburg, Russia, 196642
Bolshaya Morskaya St., 39, Saint Petersburg, Russia, 190000
Bolshoy Prospekt P.S., 39, apt. 8, Saint Petersburg, Russia, 197198
9 Rentgen Street, Saint Petersburg, Russia, 197101
Professora Popova St., 41/5, Saint Petersburg, Russia, 197376
Sadovaya St., 55-57, Saint Petersburg, Russia, 190068
English Embankment, 54, Saint Petersburg, Russia, 199034
Angliyskiy Ave., 8/10, Saint Petersburg, Russia, 190121
Kamennoostrovsky Ave., 8, Saint Petersburg, Russia, 197101
Kamennoostrovsky Ave., 61, Saint Petersburg, Russia, 197022
Kamennoostrovsky Ave., 24, Saint Petersburg, Russia, 197101
Kamennoostrovsky Ave, 16, Saint Petersburg, Russia, 197101
Kamennoostrovsky Ave., 13/2, Saint Petersburg, Russia, 197101
Kronverksky Ave., 23, Saint Petersburg, Russia, 197101
Bolshoy Prospekt P.S., 44, Saint Petersburg, Russia, 197198
Apraksin Lane, 4, Saint Petersburg, Russia, 191023
19 Vosstaniya Street, Saint Petersburg, Russia, 191036
Vvedensky Canal, 7-414, Saint Petersburg, Russia, 190013
Zhukovskogo St., 47, Saint Petersburg, Russia, 191014
Zagorodny Prospekt, 52, Saint Petersburg, Russia, 190013
Kronverksky Ave., 77, Saint Petersburg, Russia, 197198
18-a Vosstaniya St., Saint Petersburg, Russia, 191014
Zagorodny Prospekt, 45A, Saint Petersburg, Russia, 191180
Vladimirsky Ave., 19, Saint Petersburg, Russia, 191002
Vvedenskaya St., 7, Saint Petersburg, Russia, 197198
Lenina St., 33, Saint Petersburg, Russia, 194362
Gatchinskaya St., 11, Saint Petersburg, Russia, 197136
Maly pr. P.S., 32, Saint Petersburg, Russia, 197198
Maly Prospekt P.S., 26-28, Saint Petersburg, Russia, 197198
Khersonskaya St., 13, Saint Petersburg, Russia, 191024
12th Krasnoarmeyskaya St., 1, Saint Petersburg, Russia, 190005
8 Malaya Podyacheskaya St., Saint Petersburg, Russia, 190068
Stremyannaya St., 11, Saint Petersburg, Russia, 191025
Kovensky Lane, 7, Saint Petersburg, Russia, 191014
Dudergof (formerly Mozhayskaya), Saint Petersburg, Russia, 198325