Initially, a group distinguished by prestige were the princely families, which members bore the title of knyaz. These were mostly, at least according to tradition, the descendants of the dynasties who accepted the authority of Gediminids. However, only those who owned land in Lithuania proper, who was of Lithuanian origin and who had accepted Catholicism in 1386, had any influence on central state policy. The Ruthenian princes had influence only on the local situation in their lands. They varied considerably in terms of wealth and importance, some of them wielding huge estates, while others possessed their land on service tenure from the grand duke or another prince (so-called 'service princes' - князя слчжбовiе). The most powerful princes retained almost total power in their lands, recognising the supremacy of the grand dukes. Vytautas began a policy of limiting the power of the princes and incorporating their appanages into the domain. Many princes died in civil wars after his death. Many appanages, lying in the east, were lost to Moscow in the course of wars in the 15th and 16th centuries. Some families became extinct, and with the restriction of the circle of inheritance, their estates were incorporated into the grand-ducal domain. In 1499 Alexander regulated the legal system of the few remaining appanages, the magnates ruling them were given the full ius ducale. This was of little political significance since the princes as a political class were of little importance.
