Simplify the following text for a Grade 10 native English-speaking person.
Original: The first monastery he established was at Ganden , and to this day the Ganden Tripa is the nominal head of the school , though its most influential figure is the Dalai Lama .
Simplified: The first monastery he established was at Ganden , and to this day the Ganden Tripa is the nominal head of the school , though its most famous person is the Dalai Lama .