History of Rome Library was officially founded on 15 June 1475. He restored several churches, including Santa Maria del Popolo, the Aqua Virgo and the Hospital of the Holy Spirit; paved several streets and also built a famous bridge over the Tiber river, which still bears his name. His main building project was the Sistine Chapel in the Vatican Palace. Its decoration called on some of the most renowned artists of the age, including Mino da Fiesole, Sandro Botticelli, Domenico Ghirlandaio, Pietro Perugino, Luca Signorelli and Pinturicchio, and in the 16th century Michelangelo decorated the ceiling with his famous masterpiece, contributing to what
Restoration of the Sistine Chapel frescoes watercolour, to integrate the pictorial material. These areas are distinctively textured with vertical brushstrokes, not visible from a distance but easily discernible as restoration work when viewed close up. Certain small areas were left unrestored, in order to maintain a physical record of the previous restorations that had taken place, for example, an area left with overpainting and candle wax, and another area demonstrating the attempt to counteract salination with oil. Once the many layers of candle wax, varnish, and animal glue were removed from the surface of the Sistine Chapel frescoes, they became subject to dangers that could not