Complex sentence: In 1928 Camilo Mori is named director of the National Museum of Fine Arts (Spanish: Museo Nacional de Bellas Artes or MNBA), during his time in this post he was responsible for many initiatives aimed at promoting the art in Chile.
Split into simpler sentences: In 1928 Camilo Mori was named director of the National Museum of Fine Arts (Spanish: Museo Nacional de Bellas Artes or MNBA). During his tenure in this post, he was responsible for many initiatives aimed at promoting art in Chile.