Diaper patterns in brick, [i. 296]; in color, [iii. 21], [22].

Discord, how symbolized, [ii. 333].

Discs, decoration by means of, [i. 240], [416]; [ii. 147], [264].

Division of labor, evils of, [ii. 165].

Doge of Venice, his power, [i. 3], [360].

Dogtooth moulding defined, [i. 269].

Dolphins, moral disposition of, [i. 230]; use of, in symbolic representation of sea, [i. 422], [423].

Domestic architecture, richness of, in middle ages, [ii. 99].

Doors, general structure of, [i. 174], [176]; smallness of in English cathedrals, [i. 176]; ancient Venetian, [ii. 277], [iii. 227].