The successful Siege of Ctesiphon by the Rashidun army lasts about two months, from January to March 637.

Ctesiphon, located on the east bank of the Tigris, is one of the great cities of the Persian Empire, an imperial capital of the Arsacids and of their successors, the Sassanids.

Soon after the conquest of the city by Muslims, Sassanid rule in Iraq ends.Ctesiphon is located approximately at Al-Mada'in, 20 miles southeast of the modern city of Baghdad, Iraq, along the river Tigris.

Ctesiphon measured 30 square kilometers.

The only visible remnant is the great arch Taq-i Kisra located in what is now the Iraqi town of Salman Pak.