The Province of Bessarabia was an Ottoman province from 1478 to 1812. Its size varied, however by 1600, it included the towns of Cetatea Alba, Izmail, Tighina, and Chilia.
The Ottoman Province of Bassarabia was annexed by the Russian Empire in 1812, along with all Moldovan territory east of the Prut river, which the Russians governed jointly in one single Russian province of Bessarabia.
The Ottoman Province, only, is more or less the same size as the territory of modern-day Bugeac, which is currently part of the Ukrainian Odessa oblast.