Piazza duomo Lodi, Lombardy Italy Starting from the 14th century Lodi was ruled by the Visconti family, who built a castle here. In 1423, the antipope John XXIII launched the bull by which he convened the Council of Constance from the Duomo of Lodi. In 1454 representatives from all the regional states of Italy met in Lodi to sign the treaty known as the peace of Lodi, by which they intended to work in the direction of Italian unification. The town was then ruled by the Sforza family...
Miniature of Pope Gregory XII. 15th C. Pope Gregory XII (1406-1415), resigned in 1415 in order to end the Western Schism, which had reached the point where there were three claimants to the Papal throne: Roman Pope Gregory XII, Avignon Antipope Benedict XIII, and Pisan Antipope John XXIII. Before resigning he formally convened the already existing Council of Constance and authorized it to elect his successor. (via wikipedia)
Mary, also known as Maria (1371 – 17 May 1395), was Queen regnant of Hungary and Croatia between 1382 and 1385, and from 1386 until her death. She was the daughter of Louis the Great, King of Hungary and Poland, and his wife, Elizabeth of Bosnia. Mary's marriage to Sigismund of Luxembourg, a member of the imperial Luxembourg dynasty, was already decided before her first birthday. A delegation of Polish prelates and lords confirmed her right to succeed her father in Poland in 1379.
Abzeichen des 1387 von König Sigismund gestifteten Drachenordens, um 1430. Bayerisches Nationalmuseum - Werke - single
Das Horn des Königs Sigismund | rheinisch | Bildindex der Kunst & Architektur
Sigismund (Zsigmond) of Luxemburg (14 February 1368 - 9 December 1437) was King of Hungary and Croatia from 1387, King of Bohemia from 1419, and Holy Roman Emperor for four years from 1433 until 1437, the last male member of the House of Luxemburg. He was also King of Italy from 1431, and of Germany from 1411.
Eberhard Windeck, Das Buch von Kaiser Sigmund, the life and times of the Emperor Sigismund, in German, 1440-50