Hagia Sophia, once the largest church in the world, had its Christian mosaic work restored in the 1930s, when it became a museum in the 1930s, under the then Turkish leader, Mustafa Kemal Ataturk, after being converted to a mosque, in the 15th century. Now it is becoming a mosque again.
Here is a short video on the background history regarding Hagia Sophia:
August 20th, 2020 at 11:21 pm
Historian Tom Holland on the 2020 story about Hagia Sophia:
https://unherd.com/2020/08/the-end-of-secularism-is-nigh/
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