Tsargrad (Old Church Slavonic: Цѣсарьградъ; Church Slavonic; Царьгра̀дъ, ; South Slavic languages: Carigrad or Цариград, depending on their alphabets (or Tsarigrad as an alternative Latin transliteration of Cyrillic); ; ; ; ; also rendered as Czargrad and Tzargrad; see Tsar) is a Slavic name for the city of Constantinople, the capital of the Eastern Roman Empire, commonly known as the "Byzantine Empire"; and present-day Istanbul in Turkey.

Tsargrad (Old Church Slavonic: Цѣсарьградъ; Church Slavonic; Царьгра̀дъ, ; South Slavic languages: Carigrad or Цариград, depending on their alphabets (or Tsarigrad as an alternative Latin transliteration of Cyrillic); ; ; ; ; also rendered as Czargrad and Tzargrad; see Tsar) is a Slavic name for the city of Constantinople, the capital of the Eastern Roman Empire, commonly known as the "Byzantine Empire"; and present-day Istanbul in Turkey.