Columbia subject headings:
Alfonso X, King of Castile and Leon, 1221-1284.
Architecture, Medieval--Spain.
City planning--Spain--History.
Spain--History.
Harvard subject headings:
Alfonso X, King of Castile and Leon, 1221-1284
Architecture, Medieval--Spain
City planning--Spain--History.
Spain--History
Princeton subject headings:
Alfonso X, King of Castile and Leon, 1221-1284.
Architecture, Medieval--Spain.
City planning--Spain--History.
Spain--History.