Complex sentence: The Ottoman sultans Abdul Hamid II and Mehmed V were awarded Grand and Lesser Necklace of the Order of St Alexander in brilliants which are currently kept in the collection of the Topkapı Palace in Istanbul.
Split into simpler sentences: The Ottoman sultans Abdul Hamid II and Mehmed V were respectively awarded the Grand and Lesser Necklace of the Order of St Alexander with diamonds. They are currently kept in the collection of the Topkapı Palace in Istanbul.