The emoji☦️is the Orthodox Cross or Byzantine Cross, which is a variation of the Christian cross.
It is often used to represent the Eastern Orthodox Church, which is one of the oldest Christian denominations and is based primarily in Eastern Europe and the Middle East.
The cross has three horizontal bars, with the top bar representing the inscription "Jesus of Nazareth, the King of the Jews," the middle bar representing the crossbeam on which Jesus was crucified, and the bottom bar representing the footrest. The Orthodox Cross is also sometimes called the Russian Cross, as it is commonly used in Russian Orthodox Christianity.
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☦️ Orthodox cross
☦️ Variation selector-16