Complex sentence: The hut built in his honor was not completed until 1947, two years after A.O. Wheeler passed away, but has been expanded and renovated many times since and remains one of the ACC's most popular huts.
Split into simpler sentences: The hut built in his honor was not completed until 1947, two years after A.O. Wheeler passed away. It has been expanded and renovated many times since and remains one of the ACC's most popular huts.