This Heroic Age building helps research high end technologies that may even seem a bit familiar. Though there are many technologies available at the library, you may not require many of them to win. Assess your plans before deciding to invest in the Library.

Libraries, referring to achives of recorded human writing, can date back to anicent Sumer; though they were less about storing books or forms, and more for storing invoices, reciepts, and transactions or inventories for commercial activities.
Of course the Library of Alexandria, Egypt was one of the most significant of ancient libraries. It stood for around 300 years before being destroyed in the Roman conquest of Egypt.