The conservative Eyüp district takes its name from an important follower of Mohammed Ayub Ansari, a revered member of Islam. His tomb is next to the local mosque and is a holy place for Muslims. It's 4th in importance for pilgrimage after Mecca, Medina and Jerusalem. If it's not too busy don't miss the beautifully decorated grave. You can visit and see traditional customs of the area if you cover your head, also, you can't show your back to the grave, so you need to walk out backwards. It's better not to visit on a Friday (or another holiday) as it's busy. This quarter, in addition to the tomb, has the mosque, cemetery and a view of the Golden Horn.