 Complete the following phrase:  Sebukht was a 6th-century ambassador of the Sasanian King of Kings shahanshah Khosrow I . Seemingly a Christian, Sebukht was sent to the Byzantine capital of Constantinople in 572 to collect the annual payment of 500 pounds of gold which was part of the terms of the Fifty-Year Peace Treaty of 562. He was, however, dismissed by emperor Justin II , who sent his general Marcian against the Sasanians, thus initiating the 