A map of Europe titled “How do you call Istanbul?” showing how different countries refer to the city of Istanbul, using color coding to indicate naming conventions. Most of Europe is shaded in red, meaning the city is called Istanbul or a close variation in those languages. A large area to the northeast, including Russia and nearby regions, is colored yellow, indicating usage of Istanbul but sometimes also the older name Tsarigrad. In southeastern Europe, several countries are shaded light blue, showing that both Istanbul and Constantinople are used depending on context. Greece stands out in dark blue, indicating consistent use of the historical name Constantinople. The map includes a legend explaining the color categories and highlights regional linguistic and historical differences in how the city’s name is used across Europe.