Jan de Witte
Jan de Witte was a Polish military engineer, professional officer and architect of Dutch descent. The designer of, among others, the Dominican church in Lww and the Carmelite monastery in Berdyczw , he was also the military commandant of the fortress at Kamieniec Podolski .
Jan de Witte was born in the Russian army encampment near Poltava onJuly 1709, as a son of Jan de Witte , a professional officer coming from a Dutch Protestant family from Dordrecht, at that time employed in the Russian army which waged war with Sweden. In 1718 Jan the Witte joined the army of PolishLithuanian Commonwealth, and took up residence in the town of Kamieniec in Podolia possessing the famous fortress. At that time he probably turned Catholic, he also married a local woman from a prominent noble family.
Source: Wikipedia