text: In 1351, Charles's son and successor, Louis I () confirmed all provisions of the Golden Bull, save the one that authorized childless noblemen to freely will their estates. Instead, he introduced an entail system, prescribing that childless noblemen's landed property "should descend to their brothers, cousins and kinsmen". This new concept of  also protected the Crown's interests: only kin within the third degree could inherit a nobleman's property and noblemen who had only more distant relatives could not dispose of their property without the king's consent. Louis I emphasized all noblemen enjoyed "one and the selfsame liberty" in his realms and secured all privileges that nobles owned in Hungary proper to their Slavonian and Transylvanian peers. He rewarded dozens of Vlach  with true nobility for military merits. The vast majority of the Upper Hungarian "noble sons of servants" achieved the status of true noblemen without a formal royal act, because the memory of their conditional landholding fell into oblivion. Most of them preferred Slavic names even in the 14th century, showing that they spoke the local Slavic vernacular. Other groups of conditional nobles remained distinguished from true noblemen. They developed their own institutions of self-government, known as seats or districts. Louis decreed that only Catholic noblemen and  could hold landed property in the district of Karánsebes (now Caransebeș in Romania) in 1366, but Eastern Orthodox landowners were not forced to convert to Catholicism in other territories of the kingdom. Even the Catholic bishop of Várad (now Oradea in Romania) authorized his Vlach  (leaders) to employ Orthodox priests. The king granted the Transylvanian district of Fogaras (around present-day Făgăraș in Romania) to Vladislav I of Wallachia () in fief in 1366. In his new duchy, Vladislav donated estates to Wallachian ; their legal status was similar to the position of the  in other regions of Hungary.