We are very happy to announce that, starting January 31, 2022, barring any unforeseen circumstances, we will return to our pre-pandemic opening hours for the spring semester, including late evening and weekend hours. Please refer to our hours calendar for detailed day-by-day information.

Please note that, while we return to our pre-pandemic opening hours, for the present access will continue to be restricted to affiliates (i.e. Columbia faculty, students and staff) only. We are not yet able to welcome back outside researchers. As soon as this policy changes, it will be reported here.