[137] Especially in the time of the Emperors Henry IV and V (1056-1125).
[138] The German Empire was regarded during the Middle Ages as a continuation of the Roman Empire. (See below, p. 153.) The right to crown an emperor was held to be the prerogative of the pope; until the pope bestowed the imperial crown, the emperor bore the title, "King of the Romans."
[139] In the canon law, Decretal. Greg. lib. i, tit. 33, cap. 6.
[140] In the treatise, Resolutio Lutheriana super propositione XIII, de potestate papae (1520). Weimar Ed., II, pp. 217 ff.; Erl. Ed., op. var. arg., Ill, pp. 293 ff.
[141] See p. 70.
[142] cf. The Papacy at Rome, Vol. I, pp. 357 f.
[143] A decree of Pope Clement V of 1313, incorporated subsequently in the canon law, Clement, lib. ii, tit. 11, cap. 2.
[144] A forged document of the VIII Century, professing to come from the hand of the Emperor Constantine (306-337). The Donation conveyed to the pope title to the city of Rome (the capital had been removed to Constantinople), certain lands in Italy and "the islands of the sea." It was used by the popes of the Middle Ages to support their claims to worldly power, and its genuineness was not disputed. In 1440, however, Laurentius Valla, an Italian humanist, published a work in which he proved that the Donation was a forgery. This work was republished in Germany by Ulrich von Hutten in 1517, and seems to have come to Luther's attention in the early part of 1520, just before the composition of the present treatise (C. Enders II, 332). Luther subsequently (1537) issued an annotated translation of the text of the Donation (Erl. Ed., XXV, pp. 176 ff.).
[145] The papal claim to temporal sovereignty over this little kingdom, which comprised the island of Sicily and certain territories in Southern Italy, goes back to the XI Century, and was steadily asserted during the whole of the later Middle Ages. It was one of the questions at issue in the conflict between the Emperor Frederick II (1200-1260) and the popes, and played an important part in the history of the stormy times which followed the all of the Hohenstaufen. The popes claimed the right to award the kingdom to a ruler who would swear allegiance to the Holy See. The right to the kingdom was at this time contested between the royal houses of France and of Spain, of which latter house the Emperor Charles V was the head.
[146] The popes claimed temporal sovereignty over a strip of territory in Italy, beginning at Rome and stretching in a northeasterly direction across the peninsula to a point on the Adriatic south of Venice, including the cities and lands which Luther mentions. This formed the so-called "States of the Church." The attempt to consolidate the States and make the papal sovereignty effective involved Popes Alexander VI (1492-1503) and Julius II (1503-1513) in war and entangled them in political alliances with the European powers and petty Italian states. It resulted at last in actual war between Pope Clement VII and the Emperor Charles V (1526-1527). See Cambridge Modern History, I, 104-143; 219-252, and literature cited pp. 706-713; 727 f.