Before visiting Hagia Sophia I had no idea that it is not a practicing Mosque anymore. So before going there we stopped at our hotel and I changed my shorts to pants. You can’t wear shorts in Mosque. It was the middle of summer, around 95F and high humidity, needless to say wearing pants was not super comfortable. I was super annoyed to see all other tourists going through ticket office and none wearing pants. Doing some research prior to visit would avoid this, but I rarely do a lot of research as I don’t like to have a lot of different expectations about places I visit.
Note for next visit to Hagia Sophia – you don’t have to wear clothes that would be required to have in normal Mosque.
The inside was impressive. See it for your self. I shared another photo while back, The View of the Heavens.