John VII Palaiologos or Palaeologus was Byzantine emperor for five months in 1390, from 14 April to 17 September. A handful of sources suggest that John VII sometimes used the name Andronikos (Ἀνδρόνικος), possibly to honour the memory of his father, Andronikos IV Palaiologos, though he reigned under his birth name.
The Gate of Charisius, through which John VII entered Constantinople on 14 April 1390
Coin of Francesco II Gattilusio, the father of John VII's wife Irene Gattilusio
Portrait of Sultan Bayezid I by Cristofano dell'Altissimo (1552–1562)
The medieval walls of Thessalonica were worked on extensively during John VII's reign in the city.
John V Palaiologos or Palaeologus was Byzantine emperor from 1341 to 1391, with interruptions. His long reign was marked by constant civil war, the spread of the Black Death and several military defeats to the Ottoman Turks, who rose as the dominant power of the region.
Restored mosaic of John V Palaiologos in the eastern arch of Hagia Sophia.