Complex sentence: The three-storied museum is located in the Sultan Park in Male', which is the site of the official Sultan's Palace during the 17th century and the park is also the only remaining structure of the palace destroyed in 1968.
Split into simpler sentences: The three-storied museum is located in the Sultan Park in Male', which is also the site of the official Sultan's Palace during the 17th century. The Sultan park is also the only remaining structure of the palace demolished in 1968.