The American Heritage® Dictionary of the English Language, Fourth Edition
Per·sep·o·lis (pər-sĕpʹə-lĭs)
An ancient city of Persia northeast of modern Shiraz in southwest Iran. It was the ceremonial capital of Darius I and his successors. Its ruins include the palaces of Darius and Xerxes and a citadel that contained the treasury looted by Alexander the Great.
如上所示请问关于northeast of 及后面搭配的部分在句中是做什么成分,或者northeast of sth 在这里是名词(定语从句简化)还是做地点副词短语相当于here/there地点副词功能?