Columbia subject headings:
Architecture.
Ruskin, John, 1819-1900--Congresses.
Ruskin, John, 1819-1900--Knowledge and learning--Congresses.
Harvard subject headings:
Ruskin, John, 1819-1900--Congresses.
Ruskin, John, 1819-1900--Contributions in architecture--Congresses.
Ruskin, John, 1819-1900--Knowledge--Architecture--Congresses.
Princeton subject headings:
Ruskin, John, 1819-1900--Congresses.
Ruskin, John, 1819-1900--Contributions in architecture--Congresses.
Ruskin, John, 1819-1900--Knowledge--Architecture--Congresses.