Qusta ibn Luqa;
(820–912) (Costa ben Luca, Constabulus) was a Syrian Melkite Christian physician, philosopher, astronomer, mathematician and translator. He was born in Baalbek. Travelling to parts of the Byzantine Empire, he brought back Greek texts and translated them into Arabic.
Qusta ibn Luqa al-Ba’albakki, i. e. from Baalbek or Heliopolis, Lebanon, a Melkite Christian, was born in 820 and flourished in Baghdad. He was a philosopher, physician, mathematician and astronomer. He died in Armenia in A.D. 912.