♦Then suddenly most prominent,♦ At the close of this period, instead of finding Poland exhausted almost to death, we see her occupying the proud position of the saviour of Europe. At a most critical moment, when the last great wave of barbarian invasion was rolling over Europe, and seemed likely to overwhelm the ancient empire of the Hapsburgs, this little republic stood firmly in the gap, and became the bulwark of Christendom against the infidel. Nay more, by her own sacrifices no less than by her opportune intervention, she was the main instrument in setting the final limit to the Ottoman advance. ♦Owing to John Sobieski.♦ This extraordinary result is to be ascribed almost solely to the personal character and exploits of her patriot king, John Sobieski. Rising to the throne by his personal merits alone in spite of the most malignant envy, he was the first native king unconnected with the old royal line. ♦His difficulties mainly caused by the constitution.♦ It may be said that his life from his early manhood is at no time the history of a private man; it rather comprises the whole contemporary annals of his country. Yet it forms the most destructive comment on her institutions, both social and political, and on the character of the national nobility. While we must admire a conservative constitution which admits of the supremacy of the best man, we cannot but deplore those faults in its working which had the effect of nullifying his authority. In Poland there was neither a republic nor a monarchy, but the sovereignty of one man under the control of an unrestrained class, which mistook licence for freedom. In order to understand the position of Sobieski and the difficulties with which he had to contend, a short account of the Polish constitution is indispensable.