In the Will written by Ioannis in 1384, he states the following:
'Many years ago, while my late brother the renowned Commander of the Army was still alive, we built a Monastery together at the illustrious and brilliant Mt Athos, and we dedicated it to Christ the Almighty. Since he left this life, I have assumed the responsibility for the completion of the remaining work and, after having acquired for the Monastery many beautiful pieces of land and buildings in different areas as well as on Mt Athos, I continue to work even until now, albeit exclusively at my own expense, as much as my desire and my abilities permit…'
It is likely that he died prior to May 1387, and he was buried in the Monastery, next to his brother.
