By the end of the 12th century, the divide of the country was final and new centers of power took the Kievan style and adopted it to their traditions. In the northern principality of Vladimir-Suzdal the local churches were built of white stone with the help of Friedrich Barbarossa's Romanesque masters, whilst their wall statuary was elaborately carved by craftsmen from Georgia. The Suzdal style is also known as "white-stone architecture" ("белокаменное зодчество"). The first white-stone church was the St. Boris and Gleb Church commissioned by Yuri Dolgoruky, a church-fortress in Kideksha near Suzdal, at the supposed place of the stay of knyazes Boris and Gleb on their pilgrimage to Kiev. The white-stone churches mark the highest point of pre-Mongolian Rus' architecture. The most important churches in Vladimir are the Assumption Cathedral (built 1158–60, enlarged 1185–98, frescoes 1408) and St Demetrios Cathedral (built 1194–97).