Kremianetz (18,000 pop.) on the Ikva, a strong fortress in the days of the Ukrainian princes, now carries on a considerable [320]grain trade. On the Horin, at the point where that river becomes navigable, lies Ostroh (15,000 pop.), with many ruins, the former residence of the Princes of Ostrohsky, who founded an academy here in the 16th Century, and made of Ostroh an important spiritual center of the Ukraine of that time. Zaslav (13,000 pop.), likewise on the Horin, was once the residence of the Princes of Zaslavsky. Both cities carry on some trade in grain today. On the Sluch lie the cities of Starokonstantiniv (17,000 pop.), founded by the Princes of Ostrohsky, with considerable export of grain and cattle, and Novhorod-Volinsky (Zviahel, 17,000 pop.), rich in marsh-ore and pottery-clay. Korez (10,000 pop.) is famous for its porcelain clay. Just on the border of Volhynia lies its administrative center, Zitomir (93,000 pop.). This old city lies at the edge of the forest and agricultural regions, carries on a considerable trade in grain and wood, salt and sugar, and has an important clothing, leather and tobacco industry. Downstream, on the Teterev, lies the little commercial city of Radomishl (11,000 pop.). Podolia’s natural territory embraces the most eastern part of Galicia and almost the entire Government of Podolia, besides the northern borderlands of Kherson. Podolia is a purely agricultural region; its manufacturing is limited to home industry, besides some mills, distilleries and sugar factories. The Podolian villages are large as a rule, lie in rows in the cañon valleys, while, on the height of the plateau, usually only single farms and hamlets are seen. The huts are almost all built of loam and covered with straw. City settlements are rare and small, all insignificant emporiums for agricultural and animal products.