The country's cultural heritage was marked by numerous churches and monasteries built by the Moldavian ruler Stephen the Great in the 15th century, by the works of the later renaissance Metropolitans Varlaam and Dosoftei, and those of scholars such as Grigore Ureche, Miron Costin, Nicolae Milescu, Dimitrie Cantemir and Ion Neculce. In the 19th century, Moldavians from the territories of the medieval Principality of Moldavia, divided into Bessarabia, Bukovina, and Western Moldavia (after 1859, Romania), made a significant contribution to the formation of the modern Romanian culture. Among these were many Bessarabians, such as Alexandru Donici, Alexandru Hâjdeu, Bogdan Petriceicu Hasdeu, Constantin Stamati, Constantin Stamati-Ciurea, Costache Negruzzi, Alecu Russo, Constantin Stere.