Simplify the following text for a Grade 11 native English-speaking person.
Original: Her father was the ruler of a city called either under his name , as `` Tantalis '' or `` the city of Tantalus '' , or as `` Sipylus '' , in reference to Mount Sipylus at the foot of which his city was located and whose ruins were reported to be still visible in the beginning of the 1st century AD , although few traces remain today . Her father is referred to as `` Phrygian '' and sometimes even as `` King of Phrygia '' , although his city was located in the western extremity of Anatolia where Lydia was to emerge as a state before the beginning of the first millennium BC , and not in the traditional heartland of Phrygia , situated more inland .
Simplified: The city has the same name than the mountain on which it was founded ( Mount Sipylus ) and of which few traces remain , and not in the traditional heartland of Phrygia lying more inland and centered around Gordion .