Simplify the following text for a Grade 7 native English-speaking person.
Original: As well as being the leading portrait photographer in Cuzco , Chambi made many landscape photographs , which he sold mainly in the form of postcards , a format he pioneered of in Peru .
Simplified: He was the leading portrait photographer in the Andean city of Cusco . Chambi also took many landscape photographs , and he sold these photographs as postcards .