Johannes IV., Imperium Byzantinum, Imperator
- Dates of Life
- Wirkungsdaten [1250 - ca. 1291]
- Authority Data
- GND: 102544468 | OGND | VIAF: 17617331
- Alternate Names
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- Johannes IV., Imperium Byzantinum, Imperator
- Jean IV., Orient, Empereur
- Jean, Lascaris
- Johannes, Laskaris
- Laskaris, Johannes