IS POLAND LOST ? Jagello's empire grew and prospered. It was the largest in the Europe of his time, extending from the Baltic to the Black Sea. It was also powerful and secure from attack. At the same time, aggres- sion was never part of Jagello's policy, nor has it been favoured by any Slav people, with the sole exception of Russia. In that respect, at least, the Poles have always been superior to the Germans, with whom aggression has been a tradition. The delegates whom Jagello sent to the Council of Constanza, the great international congress of the fifteenth century, represented the most progres- sive, Christian, lawful and non-violent principles in the political life of their age. When the 'Heathen3 King died in [consequence of a cold in his small castle in the region of Lemberg, he left behind a powerful country which was safe from attack both on its eastern and western frontiers. That fact gave his dynasty an opportunity for the consolidation and extension of its power. . Hungary, which was now exposed to the onslaughts of Islam, sought safety in an alliance with Poland, and invited Jagello's son, Vladyslav, to occupy the Hungarian throne, thus uniting the two countries under one King. ">^This fact was destined to influence the shaping of \European history four centuries later, for it the foundations not only of a political but c> a sentimental friendship between Poland and . That was why, at the encjl of the great when Poland was at grips with Bolshevik 33