Introduction to Snake Church: The name of Snake Church (Yilanli Church) comes from the snake on the mural in the church. The fresco on the left shows St George and St Theodore attacking a snake-like "dragon", while Emperor Constantine and his mother stand aside holding a cross. The mural on the right shows a naked old man with a white beard but with female breasts. It turns out to be the legendary Egyptian saint Onouphrios. She turned out to be too beautiful and was constantly harassed by men. She could not concentrate on her spiritual practice. So she prayed to the Virgin every day, and finally a miracle happened. God made her look like half a man and half a woman. Her piety led to her being canonized as a "saint", so the church was also called Sant'Annofeili. Church of Os.