Grodno/Hrodna Region (Belarusian: Гродзенская вобласць, Hrodzienskaja vobłasć; Lithuanian: Gardino sritis; Polish: Obwód grodzieński; Russian: Гродненская область, Grodnenskaya oblast) is one of the regions of Belarus. It is located in the northwestern part of the country. The capital, Grodno, is the biggest city of the region. It lies on the Neman River. Grodno's existence is attested to from 1127. Two castles dating from the 14th - 18th centuries are located here on the steep right bank of the Nemen. Many consider this city one of the most beautiful in Belarus: one of its masterpieces survived through the centuries, Orthodox St Boris & St Gleb (Kalozhskaya) Church dating back to the 12th century, is the second oldest in Belarus.