1411 Sigismund 1437 Sigismund of Luxemburg / Sigismund von Luxemburg (Nürnberg 1368 - Znojmo 1437), King of Hungary, of Croatia from 1387 to 1437, of Bohemia from 1419, and Holy Roman Emperor for four years from 1433 until 1437
(Wikipedia).
Friedrich der Zweite Friedrich II. / Frederick II (Jesi near Ancona 1194 - Castel Fiorentino near Lucera, 1250), Holy Rkoman Emperor 1220-1250, one of the most powerful Holy Roman Emperors of the Middle Ages and head of the House of Hohenstaufen
(Wikipedia).
Rudolf von Habsburg, signed Rusthardt Rudolf von Habsburg / Rudolph I (also known as Rudolph of Habsburg) (Limburg, Breisgau 1218 - Speyer 1291), King of the Romans from 1273 until his death
(Wikipedia).
Wilhelm der Erste Wilhelm I (Berlin 1797 - id. 1888),
King of Prussia (since 1861) and German Emperor (since 1861)
(Wikipedia).
Karl der Große - Charlemagne (unknown place 742 - Aachen 814),
King of the Franks (since 768) and Emperor (since 800)
(Wikipedia).
Friedrich Barbarossa Friedrich I. Barbarossa / Frederick I Barbarossa (ca. 1122 - 1190), German Holy Roman Emperor. He was elected King of Germany at Frankfurt on 4 March 1152 and crowned in Aachen on 9 March, crowned King of Italy in Pavia in 1155, and finally crowned Roman Emperor by Pope Adrian IV, on 18 June 1155
(Wikipedia).
Arnulf von Karnthen Arnulf von Kärnten / Arnulf of Carinthia (c. 850 - Regensburg 899), the Carolingian King of East Francia[1] from 887, the disputed King of Italy from 894 and the disputed Holy Roman Emperor from February 22, 896 until his death
(Wikipedia).
Maximilian der Erste Maximilian I (Wiener Neustadt 1459 - Wels 1519), King of the Romans (also known as King of the Germans) from 1486 and Holy Roman Emperor from 1493 until his death
(Wikipedia).
Ludwig der Bayer Ludwig IV. der Bayer / Louis IV
(München 1281/82- Puch bei Fürstenfeldbruck 1347)
King of Germany (King of the Romans) from 1314, King of Italy from 1327 and Holy Roman Emperor from 1328
(Wikipedia).
Annotation
Above the entrance is the weathered statue of Charlemagne, founder of the Bishopric of Osnabrück. To the right and left of him are eight sculptures of emperors. Those statues are a gift of the Prussian emperors in the 19th century, that is why a statue of the Prussian king and later German Emperor William I is added.