Context: As one of the earliest centers of book-printing in Europe (see above: History), Strasbourg for a long time held a large number of incunabula—documents printed before 1500—in her library as one of her most precious heritages. After the total destruction of this institution in 1870, however, a new collection had to be reassembled from scratch. Today, Strasbourg's different public and institutional libraries again display a sizable total number of incunabula, distributed as follows: Bibliothèque nationale et universitaire, ca. 2 098 Médiathèque de la ville et de la communauté urbaine de Strasbourg, 394 Bibliothèque du Grand Séminaire, 238 Médiathèque protestante, 94 and Bibliothèque alsatique du Crédit Mutuel, 5.

Question: What are incunabula's? 
Answer: documents printed before 1500

Question: When was the library destroyed?
Answer: 1870

Question: What kind of building holds incunabula's today?
Answer: public and institutional libraries

Question: In what year did book-printing begin in Strasbourg?
Answer: Unanswerable

Question: In what year had the previous library been built?
Answer: Unanswerable

Question: In what year was Bibliotheque nationale et universitaire built?
Answer: Unanswerable

Question: In what year was Mediatheque protestante built?
Answer: Unanswerable

Question: In what year was Bibliotheque alsatique du Credit Mutuel built?
Answer: Unanswerable