Misc: What was the city of Istanbul called before 330 AD?

Questions

What is the name for the ancient trade route between China and the Mediterranean?

Where did Lord Kitchener defeat the Mahdi in 1898?

Which disease is tested for by the Schich Test?

With which art form was Donald Mcgill particularly associated?

Who had top 10 hits in 1980s with Blue Eyes and Passengers?