Question: Who is Maria-Irene Palaiologina's paternal grandmother?
Sentence (from "Andronikos III Palaiologos"): His reign included the last failed attempts to hold back the Ottoman Turks in Bithynia and the defeat at Rusokastro against the Bulgarians, but also the successful recovery of Chios, Lesbos, Phocaea, Thessaly, and Epirus.
Relevant evidence: No