Illustration of a red flag with a white rectangle with a red cross on it and blue text on a white background
The flag of Tonga was adopted in 1875 and the constitution of 1875 states the Tongan flag should never be altered. The flag consists of a red base with a red cross on a white square in the upper left corner. The red cross represents Christianity and the white of the flag represents purity. The red of the flag represents the blood Jesus shed at his crucifixion reminding the people of Tonga that they owe their salvation to him.