Columbia subject headings:
Harvard subject headings:
Authors, Russian--18th century--Biography--Congresses.
Lʹvov, N. A. (Nikolaĭ Aleksandrovich), 1751-1803--Appreciation--Congresses.
Lʹvov, N. A. (Nikolaĭ Aleksandrovich), 1751-1803--Congresses.
Lʹvov, N. A. (Nikolaĭ Aleksandrovich), 1751-1803--Contemporaries--Congresses.
Russia--Intellectual life--18th century--Congresses.
Princeton subject headings:
Architects--Russia--Biography.
Lʹvov, N. A. (Nikolaĭ Aleksandrovich), 1751-1803--Friends and associates.