Nicholas B. Vassilieve (Russian: Николай Васильевич Васильев; 8 December [O.S. 26 November] 1875 Uglich uezd, Governorate of Yaroslavl, Russian Empire – 1958 Bayside, New York, USA) was a Russian architect who emigrated to the United States in 1923.
Nicholas B. Vassilieve was born on November 26 (8 December) 1875 in the village of Uglich in the Pogorelki county of the Yaroslavl province. His father, a native peasant, later became a member of the merchant class in St. Petersburg.
After completing his military service, Vassilieve joined the Institute of Civil Engineers in 1896. Upon graduation in 1901, he received a silver medal "for architectural design". After the Institute, he entered the Academy of Fine Arts, where he studied in the studio Leon Benois. He graduated from the Academy in 1904.
Before the Revolution, he lived and worked in St. Petersburg. In 1906, he entered the Charitable Office of Empress Maria, simultaneously maintaining a private practice. Nicholas Vassilieve's primary activity was working on architectural competitions, of which he won over 90 before the Revolution. He frequently collaborated with fellow architects and former classmates. Vassilieve's outstanding creativity and imagination dominated most of his collaborative work, as his colleagues were left to finesse the plans and determine the structural engineering of the project.
Among his most successful alliances was one with his friend and former classmate Alexey Bubyr. Together they designed the Apartment House at 11 Stremianaya Street (доходный дом Угрюмовых), the German theater (Немецкий театр) in Reval (Tallinn) and the Luther House (Вилла-особняк А. Лютера) also in Reval.
Amongst the most visible works of Vassilieve remaining in St. Petersburg are the Mosque (Санкт-Петербургская соборная и кафедральная мечеть) on Kronverkski Prospect, 7., The New Passage («Новый Пассаж») at Liteiny Prospect, 57 and the Guards Economic Society Building (Торговый дом Гвардейского экономического общества) at Bolshaya Konyushennaya Street, 21-23.
Vassilieve is considered one of the leaders of the "Northern Modern" architectural movement, that emerged in St. Petersburg around 1900, influenced both by the American architect H.H. Richardson and the Finnish master Eliel Saarinen. In 1910, Nicholas Vassilieve, keeping it with a national trend, moved towards a more "neo-classical" style.