Made from the GNU maps of the Byzantine Empire by several editors on Commons and Wikipedia:

• 550 (Western Roman Empire shown in green), by User:Jniemenmaa. (The file actually used is shown below.)
• 717 at the accession of Leo III, by w:User:Bigdaddy1204
• 950 under Constantine VII, by w:User:Doll91939
• 1025 under Basil II, by w:User:Bigdaddy1204
• 1095 after the Turkish invasion, by w:User:Bigdaddy1204
• 1180 under Manuel Komnenos, c. 1180. Although the Byzantines reconquered much of Asia Minor, including the fertile coastal regions, the Turks were never driven out completely. by w:User:Bigdaddy1204
• 1270 (deleted file, only a divergent PNG version, shown below, still exists) After the damage caused by the Fourth Crusade, the empire could not restore itself to the position it had held under Manuel Komnenos. By w:User:Bigdaddy1204
• 1400, by User:Jniemenmaa. (Not the version actually used.)

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550:

717:

867:

950:

1025:

1095:

1180:

1270:

1400: