Possibly the most perfectly pretty mosque in Istanbul, Rüstem Pasa Mosque is home to the most stunningly preserved Iznik tile panels in the city. 

Sure the Blue Mosque may get all the glory, but it's here — covering both the exterior courtyard walls and the mosque interior itself — that you'll find the best examples of these gorgeously intricate hand-painted tiles in blues, reds, and greens. 

Even better, as it's less known, you're likely to be able to admire them up close without having to battle any crowds.