Hagia Sophia is located in Istanbul, the capital of Turkey. It also has the same name in Harbin, China. However, this Hagia Sophia is a Byzantine building with nearly 1,500 years of history. After being captured by the Ottomans, it became the Aya Sofia Mosque and later became a museum. It was also a fateful journey and was later named one of the world's cultural heritage. Due to changes in all parties and poor maintenance, the church was seriously damaged and is still being repaired. I hope that such a beautiful church can be preserved. There are a lot of little black cats in , like the elves in the church.