Complex sentence: The Emirs of Lebanon used to have their residence in Chouf, most notably Bachir Chehab II, who built the magnificent palace of Beiteddine during the first half of the 19th century.
Split into simpler sentences: The Emirs of Lebanon used to have their residence in Chouf. Most notably, Bachir Chehab II built the magnificent palace of Beiteddine during the first half of the 19th century.