Byzantine Emperor Nikephoros III flanked by personifications of Truth and Justice, and by his senior court dignitaries — from illuminated manuscript dated between 1074 and 1081 - Bibliothèque nationale de France
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=57624726

Solidus of Theodosios III —
Photo Credit: By Otto Nickl - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=47763006

Solidus of Anastasius II —
Photo Credit: By Classical Numismatic Group, Inc. http://www.cngcoins.com, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=25550274

Solidus of Philippikos Bardanes —
Photo Credit: By Classical Numismatic Group, Inc. http://www.cngcoins.com, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=25550243

Map of the Byzantine Empire and the Balkans in 700 AD —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=6327251

Tiberius III — written with bronze and black ink upon paper
Photo Credit: By Classical Numismatic Group, Inc. http://www.cngcoins.com, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=25550215

Solidus of Leontius —
Photo Credit: By Classical Numismatic Group, Inc. http://www.cngcoins.com, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=25550166

Justinian II — mosaic in Sant'Apollinare in Classe
Photo Credit: By Marvelfannumber1 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=94456018

Battle of the Yarmuk — Illustration of the Battle of Yarmouk (636) at the bottom of the page of BNF Nouvelle acquisition française 886 fol. 9v (early 14th century). The Saracens are shown with a star and crescent banner, the Byzantines (anachronistically in Crusader era armour) with a star banner. Note that the banner designs are not attributed to factions with any consistency by this illustrator:
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=51788912

Map of Constantinople (modern Istanbul) and its environs during Byzantine times —
Photo Credit: By Cplakidas - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=22706377

Greek fire during siege of Constantinople — Depiction of the use of Greek fire, from the Madrid Skylitzes. It was used for the first time during the first Arab siege of Constantinople, in 677 or 678.
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=302463