Possible Clues:

• 1942 film starring Jeanette MacDonald and Robert Young
• Where “Death on the Nile” opens
• Capital Greek letters read out
• City near Memphis
• Capital near the only one of the Seven Wonders of the Ancient World that's still largely intact
• Madness's destination in a Night Boat?
• So-called 'City of a Thousand Minarets'
• City on the Nile - or at the confluence of the Ohio and Mississippi rivers
• Egyptian National Library city
• City near pyramids