Simplify the following text for a Grade 16 native English-speaking person.
Original: Ù ' Ø Ù Ø Ø Ù , Al-Qal â at al - á amrÄ â , `` the red fortress '' ) , is a palace and fortress complex constructed during the mid 14th century by the Moorish rulers of the Emirate of Granada in Al-Andalus , occupying the top of the hill of the Assabica on the southeastern border of the city of Granada in the Autonomous Community of Andalusia .
Simplified: Ù ' Ø Ù Ø Ø Ù = al-Qal ` at al - Ä amrÄ ' = `` the red fortress '' ) is a palace and fortress complex of the Moorish rulers of Granada in southern Spain ( known as Al-Andalus when the fortress was constructed during the mid 14th century ) , occupying a hilly terrace on the southeastern border of the city of Granada .