Simplify the following text for a Grade 9 native English-speaking person.
Original: The festival is held in an area named the Theresienwiese ( field , or meadow , of Therese ) , often called Wiesn for short , located near Munich 's center .
Simplified: The Oktoberfest ( also called Wiesn ) is a German festival that takes place on the Theresienwiese , a public place in the center of Munich .