Lithuania over 33% of the country. Drūkšiai is the largest, Tauragnas is the deepest and Asveja is the longest lake in Lithuania. After a re-estimation of the boundaries of the continent of Europe in 1989, Jean-George Affholder, a scientist at the Institut Géographique National (French National Geographic Institute), determined that the geographic centre of Europe was in Lithuania, at , north of Lithuania's capital city of Vilnius. Affholder accomplished this by calculating the centre of gravity of the geometrical figure of Europe. Lithuania's climate, which ranges between maritime and continental, is relatively mild. Average temperatures on the coast are in January
History of Lithuania 1410, but the allied armies failed to take Marienburg, the Knights' fortress-capital. Nevertheless, the unprecedented total battlefield victory against the Knights permanently removed the threat that they had posed to Lithuania's existence for centuries. The Peace of Thorn (1411) allowed Lithuania to recover Samogotia, but only until the deaths of Jogaila and Vytautas, and the Knights had to pay a large monetary reparation. The Union of Horodło (1413) incorporated Lithuania into Poland again, but only as a formality. In practical terms, Lithuania became an equal partner with Poland, because each country was obliged to choose its future ruler only with