Heater shield Small 277×320 Medium 554×640 Large 887×1024 Download Tiff Original 2079×2400 | (886.6 KB) Description "The best known heraldic shield is that called the heater-shaped, a type common during the thirteenth and fourteenth centuries."—Finley, 1917 Keywords Heater, heraldric, heraldry, shield, snowflake Galleries Heraldry, Shield Shapes Source: Finley, John H. Nelson's Perpetual Loose-Leaf Encyclopedia (New York City: Thomas Nelson and Sons, 1917) 11:167