Simplify the following text for a Grade 10 native English-speaking person.
Original: The First Constitutional Congress of Peru , Which he defined as reality and as a project to the new Republic of PeruWas chaired initially by whom was rector University of San Marcos , Don Toribio RodrÃ guez de Mendoza ; Of the 64 constituent members , were 54 and the San Marcos CarolineAnd the place where he met this great assembly was the Chapel of the University of San Marcos .
Simplified: The first Constituent congress of Peru took place in the chapel of the University of San Marcos in 1822 .