Columbia subject headings:
Europe--Relations--Russia--Congresses.
Music and architecture--Congresses.
Quarenghi, Giacomo, 1744-1817--Congresses.
Russia--Intellectual life--1801-1917--Congresses.
Russia--Intellectual life--18th century--Congresses.
Russia--Relations--Europe--Congresses.
Harvard subject headings:
Architecture, Italian--Russia--History--18th century--Congresses.
Music and architecture--Europe--History--18th century--Congresses.
Quarenghi, Giacomo, 1744-1817--Congresses.
Princeton subject headings:
Architecture, Italian--Russia--History--18th century--Congresses.
Music and architecture--Europe--History--18th century--Congresses.
Quarenghi, Giacomo, 1744-1817--Congresses.