English. The number of his Latin sermons has not yet been established. He may also have been responsible, wholly or in part, for other extant anonymous Old English sermons, for his style can be detected in a range of homiletic texts which cannot be directly attributed to him. However, as mentioned, some scholars believe that Wulfstan's powerful rhetorical style produced imitators, whose homilies would now be difficult to distinguish from genuine Wulfstanian homilies. Those homilies which are certainly by Wulfstan can be divided into 'blocks', that is by subject and theme, and in this way it can be seen that at different points in his life Wulfstan was concerned with different aspects of Christian life in England. The first 'block' was written ca. 996–1002 and is concerned with eschatology, that is, the end of the world. These homilies give frequent descriptions of the coming of Antichrist and the evils that will befall the world before Christ's Second Coming. They likely play on the anxiety that surely developed as the end of the first millennium AD approached. The second 'block', written around 1002–1008, is concerned with the tenets of the Christian faith. The third 'block', written around 1008–1020, concerns archiepiscopal functions. The fourth and final 'block', written around 1014–1023, known as the "Evil Days" 'block', concerns the evils that befall a kingdom and people who do not live proper Christian lives. This final block contains his most famous homily, the Sermo Lupi ad Anglos, where Wulfstan rails against the deplorable customs of his time, and sees recent Viking invasions as God's punishment of the English for their lax ways. About 1008 (and again in a revision about 1016) he wrote a lengthy work which, although not strictly homiletic, summarises many of the favourite points he had hitherto expounded upon in his homilies. Titled by modern editors as the Institutes of Polity, it is a piece of 'estates literature' which details, from the perspective of a Christian polity, the duties of each member of society, beginning with the top (the king) and ending at the bottom (common folk). Language Wulfstan was a native speaker of Old English. He was also a competent Latinist. As York was at the centre of a region of England that had for some time been colonised by people of Scandinavian descent, it is possible that Wulfstan was familiar with, or perhaps even bilingual in, Old Norse. He