Simplify the following text for a Grade 7 native English-speaking person.
Original: The Duchy of Saxe-Meiningen was one of the Saxon duchies held by the Ernestine line of the Wettin dynasty , located in the southwest of the present-day German state of Thuringia .
Simplified: The Duchy of Saxe-Meiningen was one of the Ernestine duchies .