A new tram line runs from Sirkeci, near the Galata Bridge, through Sultanahmet, past the Covered Bazaar, the hotels of Laleli and Aksaray, and on to the city walls at Topkape bus station (not to be confused with the famous palace of the same name).
A new tram line goes from Sirkeci to the city walls at Topkape.  
There are no new tram lines that go to Topkape.  