 A royal banner was used as early as the reign of Boleslaus the Generous (r. 1076-1079).The earliest mention of a banner (, pronounced ) bearing the sign of an eagle is found in Wincenty Kadłubek's "Chronicle" which says that Duke Casimir the Just fought the Ruthenians in 1182 "under the sign of the victorious eagle".A seal of Duke Premislaus II from 1290 shows the ruler holding a banner emblazoned with a crowned eagle.