Worms prospered in the High Middle Ages. Having received far-reaching privileges from King Henry IV as early as 1074, the city became an imperial free city. The bishops resided at Ladenburg and only had jurisdiction over Worms Cathedral itself. In 1122 the Concordat of Worms was signed; in 1495, an Imperial Diet met here and made an attempt at reforming the disintegrating Imperial Circle Estates by the Imperial Reform. Most important, among more than a hundred Imperial Diets held at Worms, that of 1521 (commonly known as "the" Diet of Worms) ended with the Edict of Worms, in which Martin Luther was declared a heretic after refusing to recant his religious beliefs. Worms was also the birthplace of the first Bibles of the Reformation, both Martin Luther's German Bible and William Tyndale's first complete English New Testament by 1526.