Columbia subject headings:
Architecture--Italy--Tuscany--History--Sources.
Artisans--Italy--Tuscany--History--Sources.
Building trades--Italy--Tuscany--History--Sources.
Tuscany (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Italy--Tuscany--History--Sources.
Artisans--Italy--Tuscany--History--Sources.
Building trades--Italy--Tuscany--History--Sources.
Building--Italy--Tuscany.
Tuscany (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Medieval--Italy--Tuscany.
Architecture--Italy--Tuscany.
Stonemasonry--Italy--Tuscany--History.
Stonemasons--Italy--Tuscany--History.