The hammerbeam roof, a mediaeval type of stepped wooden architecture designed for spanning wide spaces, is a feature of which ancient English building?
What type of building is famous in Milan, Venice, Florence, Seville, Paris, Chartres, Amiens, Rheims, Cologne, Mainz and Trèves?
What building, built between 1754 and 1790 as a church to St Genevieve, was set aside as a mausoleum for famous Frenchmen in 1792?
