Almost 600 years after Pope Nicholas V founded the Vatican Apostolic Library, the Holy See is now turning to 50 experts, five scanners and a Japanese IT firm to digitize millions of pages from its priceless manuscripts, opening them to the broader public for the first time. When the project is finished, one of the richest and most important collections of historical texts in the world will be available with a click of the mouse-and free. [The] institution known as the Popes' Library ... houses more than 82,000 manuscripts, some dating back to the second century. Scholars must now submit a detailed request to gain access to the library, which sits within the Vatican walls. The most precious works of art ... have been mostly off-limits. For the past year, Vatican officials have worked closely with experts at Japanese IT firm NTT DATA to test special scanners designed to handle particularly delicate documents. The machines have a protective screen to limit the manuscripts' exposure to light, and windows must remain shut and curtains drawn during the scanning procedure to keep dust and extraneous light out of the room. With the test phase finished, about 50 Italian and Japanese operators will soon begin the process of digitizing the first batch of 3,000 manuscripts under the watchful eye of Vatican librarians. That process, which will take place entirely inside the library, is expected to take four years. After each document is scanned, it will be formatted for long-term storage and then released onto the library's website. The first digital images are expected to be put online in the second half of this year.