Grodno is a city in western Belarus, near the Polish and Lithuanian borders. By the Neman River, the Old Castle is a Renaissance palace on the site of an 11th-century fort. Nearby, the New Castle was built in the 18th century as a royal residence. The 12th-century Kalozha Church of Sts. Boris and Gleb is adorned with polished stones and majolica tiles. The St. Francis Xavier Cathedral features an ornate carved altar.