Simplify the following text for a Grade 11 native English-speaking person.
Original: Pius VII in 1819 united the city of Geneva and 20 parishes with the Diocese of Lausanne , while the rest of the ancient Diocese of Geneva ( outside of Switzerland ) was reconstituted , in 1822 , as the French Diocese of Annecy .
Simplified: Later , Pope Pius VII made the cities of Geneva and Lausanne a new diocese of and part of Geneva diocese that was in France part of the French diocese of Annecy .