library collections  Organization was a strength of Islamic Libraries during the Golden Age (7th -14th century). In this period, books were organized by subject. Within the subject, the materials were further organized by when the libraries gained the item, not by last name of the author or the title of the book. Also, Islamic libraries may be the first to have implemented a catalogue of owned materials. The content of a bookshelf was recorded on paper and attached to the end of shelf. Arab-Islamic people also were very favorable of public knowledge. Public libraries were very popular along with Mosque, Private, and Academic Libraries. Instead of only societies most elite, such as caliphs and princes, information was something that was offered to everyone. Some of the libraries were said to let patrons check out up to 200 items. These buildings were also made for comfort of the readers and information seekers. It was said that the rooms had carpets for sitting and reading comfortably. Also, openings such as doors and windows were secured closed as to protect patrons against cold drafts.[55]