Complex sentence: The reputation of Moulay Idris II was maintained and revived over time, and for these reasons he is considered the patron saint of the city of Fez, and his shrine is one of the holiest in Morocco.
Split into simpler sentences: The reputation of Moulay Idris II was maintained and revived over time. He came to be considered the patron saint of the city of Fez and his shrine is one of the holiest in Morocco.