The early part of the period saw considerable missionary activity, and by 800 the whole of the Frankish Empire had, in principle, been Christianized. All the manuscripts which contain Old High German texts were written in ecclesiastical scriptoria by scribes whose main task was writing in Latin rather than German. Consequently, the majority of Old High German texts are religious in nature and show strong influence of ecclesiastical Latin on the vocabulary. In fact, most surviving prose texts are translations of Latin originals. Even secular works such as the are often preserved only because they were written on spare sheets in religious codices.