The emperor's image was displayed everywhere, and coins were only one of many instruments of imperial propaganda used to enhance the emperor's status. Huge public statues, such as the Colossus of Barletta, were intended to impress the people with his power (photo right); a wreathed and draped painted portrait of the emperor might be placed on a table at official functions (click here to see photo of Notitia dignitatum) indicating his authority over all aspects of life; or his image might appear repetitively, as it does on some consular diptychs (click here). It also appeared on official banners, on silk garments and on gold bullae that sealed some imperial letters—guaranteeing their authenticity and ensuring they had not been opened (see Bulla of Theodora, Case II, No. 48). For similar reasons, the imperial image was placed on hallmarks stamped on silver vessels, on bronze weights and on lead seals, each time serving as a kind of official guarantee. But coins were undoubtedly the most ubiquitous means of conveying to the public the imperial portrait with its intrinsic political or religious message (see Christianization of the Coinage for Christian imagery on coins).