Complex sentence: Qala is first referred to in a fifteenth-century portolan preserved at the Vatican library has taken its name from the qala or port of Ħondoq ir-Rummien.
Split into simpler sentences: Qala is first referred to in a fifteenth-century portolan preserved at the Vatican library. It has taken its name from the qala or port of Ħondoq ir-Rummien.