named after its designer Torre d'Arnolfo. The tower's large, one-handed clock was originally constructed in 1353 by the Florentine Nicolò Bernardo, but was replaced in 1667 with a replica made by Georg Lederle from the German town of Augsburg (Italians refer to him as Giorgio Lederle of Augusta) and installed by Vincenzo Viviani. Duke Cosimo I de' Medici (later to become grand duke) moved his official seat from the Medici palazzo in via Larga to the Palazzo della Signoria in May 1540, signalling the security of Medici power in Florence. When Cosimo later removed to Palazzo Pitti, he officially renamed his former palace to the Palazzo Vecchio, the "Old Palace", although the adjacent town square, the Piazza della Signoria, still bears the original name. Cosimo commissioned Giorgio Vasari to build an above-ground walkway, the Vasari corridor, from the Palazzo Vecchio, through the Uffizi, over the Ponte Vecchio to the Palazzo Pitti. Cosimo I also moved the seat of government to the Uffizi. The palace gained new importance as the seat of united Italy's provisional government from 1865 to 1871, at a moment when Florence had become the temporary capital of the Kingdom of Italy. Although most of the Palazzo Vecchio is now a museum, it remains as the symbol and center of local government; since 1872 it has housed the office of the mayor of Florence, and it is the seat of the City Council. The tower currently has three bells; the oldest was cast in the 13th century. Entrance Above the front entrance door, there is a notable ornamental marble frontispiece, dating from 1528. In the middle, flanked by two gilded lions, is the Monogram of Christ, surrounded by a glory, above the text (in Latin): "Rex Regum et Dominus Dominantium" (translation: "King of Kings and Lord of Lords". This text dates from 1851 and does not replace an earlier text by Savonarola as mentioned in guidebooks. Between 1529 and 1851 they were concealed behind a large shield with the grand-ducal coat of arms. Michelangelo's David also stood at the entrance from its completion in 1504 to 1873, when it was moved to the accademia Gallery. A replica erected in 1910 now stands in its place, flanked by Baccio Bandinelli's Hercules and Cacus. Courtyards First Courtyard The first courtyard was designed in 1453 by Michelozzo. In the lunettes, high around the courtyard, are crests of the church and city