Problem of two emperors
label: Problema dei due imperatori @it
description: disputa entre los emperadores bizantinos y del Sacro Imperio Romano Germánico acerca de qué monarca poseía legítimamente el título de emperador romano @es
subject: Category:Politics of the Holy Roman Empire
description: притязания императоров Востока и Запада на титул римского императора в Средневековье @ru
subject: Category:Schisms from the Eastern Orthodox Church
subject: Category:Byzantine Empire–Holy Roman Empire relations
subject: Category:Byzantine Empire–Carolingian Empire relations
subject: Category:Byzantine Empire–Empire of Trebizond relations
footer: The choice of the Holy Roman emperor Frederick I Barbarossa to march through the Byzantine Empire during the Third Crusade in 1189 caused the Byzantine emperor, Isaac II Angelos , to panic and nearly caused a full-scale war between the Byzantine Empire and Western Christianity.
perrow: 2
subject: Category:Rival successions
image: 144
volume: 3
align: right
subject: Category:National questions
footer: Right: Close-up of the intended approximate borders of the restored Byzantine Empire and the Kingdom of Dacia .
subject: Category:Byzantine Empire–First Bulgarian Empire relations
label: 두 황제 문제 @ko
title: PHILIP I OF TARANTO
subject: Category:History of the Byzantine Empire
width: 174
description: a problem arising when multiple people claim the title of emperor
subject: Category:History of the Ottoman Empire
page: 1652
width: 182
image: Great Catherine's dream.png
width: 150
subject: Category:Naming controversies
subject: Category:Eastern Orthodox–Catholic conflicts
subject: Category:2 (number)
footer: Left: Catherine the Great's "Greek Plan". Red marks the planned borders of the restored Byzantine Empire under her grandson Konstantin Pavlovich, blue marks the planned borders of the "Kingdom of Dacia" under Grigory Potemkin. The compensations for the Habsburg monarchy are marked with yellow and the compensations for Venice are marked with blue-green.
image: Greek Plan Catherine the Great.png
label: 雙帝問題 @zh
pages: 61
subject: Category:History of diplomacy
url: https://archive.org/details/the-oxfrod-dictionary-of-byzantium-vol.-1-oup-1991/The%20Oxfrod%20Dictionary%20of%20Byzantium_Vol.%203_OUP_1991/page/1651/mode/2up?q=%22Philip+I+of+Taranto%22|last=Talbot|first=Alice-Mary|author-link=Alice-Mary Talbot
subject: Category:Medieval politics
subject: Category:Holy Roman Empire–Russia relations
description: disputa tra i sovrani dell'Impero Romano d'Oriente e del Sacro Romano Impero per il legittimo titolo di imperatore romano @it
label: Zweikaiserproblem @de
description: 유럽에서 로마의 황제에 대한 논쟁 @ko
subject: Category:International disputes
total width: 410
subject: Category:Holy Roman Empire–Ottoman Empire relations
subject: Category:Former monarchies of Europe
description: Begriff aus der Geschichte von Ostrom und Westrom vor 800 @de
description: terme historiographique @fr
chapter: The Imperial Ideology
image: Friedrich I. Barbarossa.jpg