Question: What was the library dedicated to that Istros the Callimachean was active in?

Context paragraphs:
Kate Sharpley Library: The Kate Sharpley Library (or KSL) is a library dedicated to anarchist texts and history.  Started in 1979 and reorganized in 1991, it currently holds around ten thousand English language volumes, pamphlets and periodicals.  The library has texts in English and other languages, near complete collections of several anarchist newspapers, and collections of reports and literature from various anarchist organisations.  The library is maintained by donations and money made from sales of pamphlets and other publications.

Shia Islam in El Salvador: There is a little Shia community in El Salvador.  There is an Islamic Library operated by the Shia community, named "Fatimah Az-Zahra".  They published the first Islamic magazine in Central America: "Revista Biblioteca Islámica".  Additionally, they are credited with providing the first and only Islamic library dedicated to spreading Islamic culture in the country.

Suffolk County Historical Society Building: Suffolk County Historical Society Building is a museum and library dedicated to preserving historic artifacts of Suffolk County, New York, as well as other parts of Long Island.  It is located at 300 West Main Street as well as Osborn Avenue and Court Street in Riverhead, New York.

Robert Goldwater Library: The Robert Goldwater Library in the department of the Arts of Africa, Oceania, and the Americas, of The Metropolitan Museum of Art is a noncirculating research library dedicated to the documentation of visual arts of sub-Saharan Africa, the Pacific Islands, and Native and Precolumbian America.  The library is open to adult researchers, including college and graduate students.

E-rara.ch: e-rara. ch is a Swiss digital library dedicated to providing free online access to rare antique Swiss books and prints.  It opened to the public in March 2010, and aims to make more than 10,000 works available by the end of 2011.

Golm Metabolome Database: The Golm Metabolome Database (GMD) is a gas chromatography (GC) – mass spectrometry (MS) reference library dedicated to metabolite profiling experiments and comprises mass spectral and retention index (RI) information for non-annotated mass spectral tags (MSTs, mass spectral information with retention time attached indices) together with data of a multitude of already identified metabolites and reference substances.  The GMD is hosted at the Max Planck Institute of Molecular Plant Physiology in Golm district of Potsdam, Germany.

Istros the Callimachean: Istros the Callimachean (in Greek Ἴστρος ὁ Καλλιμάχειος) was a Greek writer pupil of Callimachus and active in the Library of Alexandria.

Library of Alexandria: The Royal Library of Alexandria or Ancient Library of Alexandria in Alexandria, Egypt, was one of the largest and most significant libraries of the ancient world.  It was dedicated to the Muses, the nine goddesses of the arts.  It flourished under the patronage of the Ptolemaic dynasty and functioned as a major center of scholarship from its construction in the 3rd century BC until the Roman conquest of Egypt in 30 BC, with collections of works, lecture halls, meeting rooms, and gardens.  The library was part of a larger research institution called the Musaeum of Alexandria, where many of the most famous thinkers of the ancient world studied.

National Library of Israel: The National Library of Israel (NLI; Hebrew: הספרייה הלאומית‎ , "HaSifria HaLeumit " ‎ ; Arabic: المكتبة الوطنية في إسرائيل‎ ‎ ), formerly Jewish National and University Library (JNUL; Hebrew: בית הספרים הלאומי והאוניברסיטאי‎ , "Beit Ha-Sfarim Ha-Le'umi ve-Ha-Universita'i " ‎ ), is the library dedicated to collecting the cultural treasures of Israel and of Jewish heritage.  The library holds more than 5 million books, and is located on the Givat Ram campus of the Hebrew University of Jerusalem.

African American Museum and Library at Oakland: The African American Museum and Library at Oakland (AAMLO) is a museum and non-circulating library dedicated to preserving the history and experiences of African Americans in Oakland, California, United States.  It contains an extensive archival collection of such artifacts as diaries, correspondence, photos, and periodicals.

Supporting paragraphs: Istros the Callimachean Library of Alexandria
Answer: the Muses