Constantinople (1025) — the same event in Skylitzes–Kedrenos, Synopsis of Histories and Epitome of Histories by Zonaras

Skylitzes–Kedrenos, Synopsis of Histories: Basil II dies suddenly of illness. His brother Constantine VIII becomes sole emperor; Epitome of Histories…

What each source says

Skylitzes–Kedrenos, Synopsis of Histories · AD 1025

Basil II dies suddenly of illness. His brother Constantine VIII becomes sole emperor

nam mense Decembri, indictione nona, anno 6534, subito correptus morbo decessit
Location: Bonn Cedrenus II p.479 (part_13 L1612-1613)

Epitome of Histories by Zonaras · AD 1025 · Constantinople

Basil II dies (the text gives LXXIT, as in the OCR — figure unverified)

vespere est mortuus; vixit et regnavit annos LXXIT
Location: 행 2497~2498

Place: Constantinopolis

Show on the map — open Skylitzes–Kedrenos, Synopsis of Histories