The Vatican Apostolic Library (), more commonly called the Vatican Library or simply the Vat, is the library of the Holy See, located in Vatican City. Formally established in 1475, although it is much older, it is one of the oldest libraries in the world and contains one of the most significant collections of historical texts. It has 75,000 codices from throughout history, as well as 1.1 million printed books, which include some 8,500 incunabula. 

The Vatican Library is a research library for history, law, philosophy, science and theology. The Vatican Library is open to anyone who can document their qualifications and research needs. Photocopies for private study of pages from books published between 1801 and 1990 can be requested in person or by mail. 

In March 2014, the Vatican Library began an initial four-year project of digitising its collection of manuscripts, to be made available online. 

The Vatican Secret Archives were separated from the library at the beginning of the 17th century; they contain another 150,000 items. 

Scholars have traditionally divided the history of the library into five periods, Pre-Lateran, Lateran, Avignon, Pre-Vatican and Vatican. 

The Pre-Lateran period, comprising the initial days of the library, dated from the earliest days of the Church. Only a handful of volumes survive from this period, though some are very significant. QUESTIONS:

Q1:
1. When was the Vatican Library formally opened?
2. When did the Vat formally open?
3. When was the Vatican Apostolic Library formally opened?
Q2:
1. What is the Vat for?
2. What was the Vatican Library established for?
3. For what was the Vat made?
Q3:
1. What kind of resesarch can be done in the Vat?
2. What subjects are studied in the Vatican Library?
3. The Vat is meant for what kind of subjects?
Q4:
1. The Vat allows research on what subjects other than history and law?
2. What can one study at the Vatican Library other than history and law?
3. What other subjects besides history and law is the Vatican library for?
Q5:
1. What efforts were started by the Vat in 2014?
2. What project was started by the Vatican Library in 2014?
3. What did the Vat start doing in 2014?
Q6:
1. How have scholars divided the Vatican library?
2. The Vatican Library has been segregated by scholars in what way?
3. How is the Vatican Library's history divided?
Q7:
1. The Vatican Library is divided into how many periods?
2. How many periods is the Vat divided into?
3. How many periods do scholars divide the library into?
Q8:
1. What is the Vat officially called?
2. What is the official name of the Vatican Library?
3. The Vat is officially known by what name?
Q9:
1. Where is the Vat located?
2. Where is the Vatican library situated?
3. Where can one find the Vatican Library?
Q10:
1. What is the number of printed books housed in the Vat?
2. How many printed books does the Vat contain?
3. How many printed books will one find at the Vat?
Q11:
1. When were the Secret Archives separated from the rest of the Vatican Library?
2. The Secret Archives were segregated from the Vatican library around what time?
3. In what century were the Secret Archives moved from the Vat?
Q12:
1. How many items does the Vat's Secret Archives have?
2. The Secret Archives in the Vatican have how many items?
3. How many items can be found in the Vatican library's secret collection?
Q13:
1. Can anyone use the Vatican Library?
2. Can the Vat be used by anybody?
3. Does the Vat allow anyone to use its resources?
Q14:
1. What must be requested to view in the Vat?
2. What items can be requested to view in the Vatican Library?
3. At the Vat, what items and documents can be viewed on request?
Q15:
1. What items from the Vat must be requested in person or by mail?
2. What documents can the Vat be asked for in person or by mail?
3. The Vat offers one to request what in person or by mail?
Q16:
1. What books' photocopies are available on request at the Vat?
2. Photocopies of what books can the Vat be asked for?
3. One can request photocopies of what books at the Vat?
Q17:
1. The Vat is the library of what?
2. The Vat is considered to be a library of what?
3. What state is the Vat the library of?
Q18:
1. How many volumes in the Vat survived the Pre Lateran period?
2. What number of books in the Vatican library are still remaining from the Pre Lateran period?
3. How many books from the Pre Lateran period have survived in the Vat?
Q19:
1. Why was the Vat project in 2014 started?
2. What purpose does the 2014 Vat project serve?
3. What is the reason behind the project started in 2014 by the Vat?
Q20:
1. What will the Vat's 2014 project do?
2. What will happen because of the 2014 project by the Vat?
3. What is the Vat's project going to achieve?
