The use of images had probably been increasing in the years leading up to the outbreak of iconoclasm.[6] One notable change came in 695, when Justinian II put a full-faced image of Christ on the obverse of his gold coins. The effect on iconoclast opinion is unknown, but the change certainly caused Caliph Abd al-Malik to break permanently with his previous adoption of Byzantine coin types to start a purely Islamic coinage with lettering only.[7] This appears more like two opposed camps asserting their positions (pro and anti images) than one empire seeking to imitate the other. More striking is the fact that Islamic iconoclasm rejected any depictions of living people or animals, not only religious images. By contrast, Byzantine iconomachy concerned itself only with the question of the holy presence (or lack thereof) of images.