My boyfriend & I will be in Istanbul from about 4:00pm on a Sunday to 11:00am on a Tuesday (our flight is at 1:00pm) in mid-May. We know the Hagia Sophia is closed on Mondays, and closes at 5:00pm on other days, so it seems our only day to see it would be on our last morning (before 11:00). However, we also know that there are usually VERY long lines and are concerned about missing our flight. I saw other travelers recommending buying tickets online at this website (http://www.muze.gov.tr/en), but the tickets link does not appear to work. Does anyone know if there's another website, or if this website is just having temporary issues? If there is not, what is the best way to decrease wait time - is there a combo ticket of some sort?