Ctesiphon

Coordinates: 33°05′37″N 44°34′50″E / 33.09361°N 44.58056°E / 33.09361; 44.58056 Ctesiphon (Persian: ایوان مدائن - تيسفون‎), /tɛsɨfɒn/, the imperial capital of the Arsacid Parthians (Persian: اشکانيان‎), and of the Sassanid Persians (Persian: ساسانيان‎), was one of the great cities of ancient Mesopotamia.